There is contrast between the traditional furniture and the focal point of the floor which pops, draws attention. I would recover the sofas in cream colored soft fabric - suede. I would leave the curtains grey, and put down a large neutral area rug. The edges of the room would show the pattern of the floor. I would color the wall and add texture to it, but not too dark as the room will appear smaller. Add a picture and put a nice plant holder, large vase in the left corner of the room - an oriental-style vase. Or, a cream-stripe fabric on the sofas. You could go soft or bold in this room - depending on your taste.

I think the yellow and grey might bring out the gold-ish-ness of the couch.. I'd try to go with more blue colors.. Maybe some navy pillows and a rug with the blue in it as well. The curtains, that ying-yang rug, and the lilac rug just gotta go.. They're dwarfing all the sophistication this room will be able to have with that tile floor and those big beautiful windows. I love the dining room chairs!

The DIY concrete floor finishing products are rarely up to "snuff" for a living situation. Most are meant to be put down in a garage where it doesn't matter if it bubbles and lifts in a year or two. Many have failed because of wrong application technique, wrong use, wrong product for the concrete, etc. A finished concrete floor in a new build is a great option. The concrete professionals will get the surface ready for polishing. The concrete floor finisher (may be a different person than the guy who installed the slab) will come in and clean/shot blast the concrete and add a layer of appropriate, high-end, high-density concrete. This concrete is then stained (if you want it) or if you want simply polished and coated with appropriate epoxy. It may take more than 1 application of the stain/epoxy to get the look you are after. This is not a "money" saving product...it is a lifestyle finish that is equal to (in price) other medium/high end finishes. It is very important to understand the quality of concrete seen with a normal slab/subfloor is NOT good enough to be polished and stained. That's why a new coating of high-end stuff is added to the slab. This high-end concrete has all the right properties to receive stain/polish/epoxy.

You list is all "stone" products. Stone products are natural. The durability is guaranteed with stone. Stain resistant...remove marble and granite from your list. Both can stain and etch and both will do this with "flooring" more than they will with a counter top. Gloss levels all change...but it will take years to do it. All stones have maintenance = homeowner needs to work at keeping stone looking good. Stone = expensive. There is no "benefit" for "reasonable" when working with stone. They all cost plenty of money. Stone is expensive. No way around it. If you want "glossy" that doesn't stain for a "good price" then you have forgotten to mention the BEST option: porcelain tiles. Porcelain will do everything you want for a lower price. Stone is expensive, it can stain (especially "oil" stains) it will "etch" or lose gloss level with certain liquids (acid based liquids will do this) and they all need to be maintained and eventually need repolishing to maintain "gloss". Durable is all you can expect out of stone. The rest of your wish list belongs with porcelain tiles.