Nice! avoiding recessed lights is a great idea. The Brightgreen website is a great resource. You can calculate the amount of light required for each space by changing beam angles, ceiling heights and color temperature. The calculator isn't set up for wall scones however the same rules apply. Ceiling mounted lights are also a great alternative to wall scones. Hope this helps. https://brightgreen.com/led-lights/d900.sh-curve-downlight 

Plain ceiling white is a good choice for ceilings. I'm a huge Natural White fan but will consider Whisper White next time I'm painting.

Hi rachemacdonald Natural white is one of my favourite interior whites. It's not too creamy but still warm and not cold and sterile. Use low sheen on walls. Use half strength on the ceilings in a flat finish. (The ceiling acts as a reflector to bounce light around the room.) The trims - arch, skirts, windows and doors can be half strength in a satin finish. This will modernise the space and make it feel more spacious. Best wishes.

Well, I'll be 1st to comment(might get ball rolling for ya!). I'm a painter, 35 yrs. Is the Dulux sw1e1? Wish you had pics of swaths side by side. But that's ok. Imo, they're both going to be just fine. I very highly doubt you would go wrong either way, you'd have no regrets. After all these years I know that white, in just about any shade, is going to work with just about any furniture. Except maybe white furniture! I'd have to see the furniture to give more detailed opinion though. If were me, I would want the floor to be dark(ish) though, not light(ish). Try to slap a few pics of some of your stuff on here and maybe you will get some better opinions than mine! And more detailed as well. Either way, I know you're fine with either of the 2 paints. Imho, of course!