Unless you both like showering at the same time, OR you want to install a rain shower one end and another type of shower another, I would recommend installing only one. At 2m you can have your towel rail and bench at the opposite end. Will you have a fixed glass screen or doors?

Hi Samantha, Interbath has a range of square and round shower heads, but not as big as 500mm. The closest size we have is 300mm, but with an ultra slim showerhead. You can find our products in any Masters or Mitre 10 store. Interbath Showerheads

They are not wells rated and often don't fit the plumbing fittings. You can try them by all means but by the time you pay for postage etc it often doesn't work out cheaper. Unfortunately these types of taps that you are after always come with a price tag, you get what you pay for cheap taps don't last long.

Depends on what type of shower you prefer, if you like a good needle like strong shower flow on your skin go for round, if you like a feeling of being in the rain go for the square. The smaller the shower head the stronger the flow, with the exception of the wand like shower heads and telephone type of square shower heads, they are weak. We went for a large square shower head in our new home build. Also don't forget the water pressure in your house as that is another factor to take into account, if it is weak then you will have a trickle!