A sunset with a view like that!
Most houses do not have the ‘ideal’ orientation and factors such as local climate, views, privacy lot constraints all must be taken into account. So if west works for you then that may just be your ideal.

Western sun has a greater negative effect in summer than its positive effect in winter.

This is because the sun is never actually directly west in winter. In the southern hemisphere it rises in the NE, moves across the northern sky, seeing in the NW.

While in summer it rises in the SE, is directly E an hour or two after sunrise, moves across the northern sky through the day, is directly W an hour or two before sunset, seeing in the SW.

Eaves are ineffective for eastern & western sun, as the sun is low in the sky.

Whether this will cause major problems in summer will depend on your climate. But I certainly wouldn't want western windows in Victoria on a day like today.

So I'd be careful about overglazing the western side. If you are going to have west facing windows, is want them shaded by a large covered alfresco area. I certainly wouldn't want west facing bedroom windows.

Choosing the right block is nearly as important as choosing the right floorplan.

You might want an eastern frontage. Living areas to the north, bedrooms to the south. Morning sun from the front of the house, evening sun at the back of the home.

But you'd want a nice wide block, to prevent overshadowing from the north. But you also don't want living areas looking straight at a northern neighbour. You might want to be picky & take your time choosing the right block.

You might like a southern frontage, with northern living areas facing the backyard. But again, would want a wide frontage. So you can have plenty of northern light, & not too much eastern & western glazing. Kitchen to the NE, alfresco to the NW to protect the home from summer afternoon sun, but enjoy the sunsets.

If you have time is certainly worth waiting, until you find a block that works with your ideas for a floorplan. It may be on or near sloping land to increase views & privacy, it border bushland. It may even be on a corner block to increase solar access & views, though likely to reduce privacy.

Have you read all of the Your Home website? The government's guide to building sustainable, energy efficient homes.

Here's the section on orientation,

https://www.yourhome.gov.au/passive-design/orientation

Here's the section in choosing a site,

https://www.yourhome.gov.au/you-begin/choosing-site

I'd recommend reading it all, it's brilliant :)

acknowledging all the excellent advice from ddaroch and yourhome.gov.au we still chose to add an extension with east, south and west facing windows because the room provides an extra living area with lovely views of the gardens and captures warmth in our cold winter... overheating is modified by specific sized and shaped double glazing, internal and external blinds and internal glass sliding doors separates the extra space from other rooms (rather than a big open plan space) and creates an airloch that helps maintain comfortable temperature in the rest of the house...an ideal suburban block of land has the long boundaries facing to open views on the north side, driveway on the south west and perfect local climate but home building will always be about compromise and in my opinion the best block of land is primarily about location (with access to work, shopping, education etc) then orientation modified by excellent house design and affordability

Okay so ideally we wouldn't have chosen a house with lots of north and western heat. But sometimes the 'choices' are limited and you have to go with what's affordable and things like price, neughbourhood etc... decide in the end. But good design can help improve things!
I am not in Victoria but further north, so actually my dream home is oriented south and east. I rented a south facing house and loved it. it was shaded from the northern sun by a hill. but our winters are short and pretty sunny compared to a melbourne winter so i get it.
Our actual house has bedrooms in the east which I don't like! they get the best light and the lounge is to the west and gloomy till just before sunset when we swelter! the only view is out to the west, and bathroom and kitchen are also on that side. But again it's the view... and the sunsets are gorgeous. My solution is to add a small verandah that runs the length of the western side. I will keep the ceiling low and flat, and enclose the bottom of the verandah and insulate it so the only light and heat comes through where we are framing the view. I am also planning to insulate the western wall anyway and the verandah ceiling. I will also run shutters along the verandah so we can close it off for that hour of extreme heat but open it again either side. the verandah will only be 1 m deep and I'll open onto it with bifolds. I want to have lots of glass and windows on the rooms coming off the verandah to look out. my gloomy lounge will be opened and connected to one of the bedrooms so then we'll have east to west orientation. it should mean morning sun, and day shade with a sunset view.

my house is asbestos clad like most 60s boxes, they don't really have any insulation! It will be replaced with matte white colorbond over insulation. I will probably go for the thickest insulation possible too, as out winters are mild and that may mean not using heating.