How exciting that you get to buy all new stuff!!
As for KitchenAid, I LOVE my KA appliances! But in my opinion, like so many brands, they have just too many options!
I recently replaced my old (1978) K5SS in almond/cream/vanilla - whatever they call the off white - with a beautiful new Empire RED Pro 600 KP26M1X, with 575 watts and 10 speeds. The new one has a lifting head and a 6 qt stainless bowl...it's BIG!
I got mine on a sale with rebate from Overstock a few months ago. I ended up (with the $50 rebate) with a net cost of $290. I thought was a great deal.
The only thing I didn't like about my new KA is that it came with "burnished" attachments. I don't like the look or feel of these, and they can't be put in the dishwasher. So I went on eBay and purchased coated replacements for the dough hook and the flat beater, and I also bought a stainless wire whip.
It just seems that the more models and variations they offer, the harder it is to choose what would work best.
Good luck and enjoy re-doing your kitchen!