I know you fluff off the "reliability" bit like it's no biggie...but these are used cars and that reliability bit could save you thousands and thousands over your ownership. So it's pretty important unless you've got money to burn or a good 3rd party warranty.
Take the 7 Series. That has always been among BMWs least reliable car, and it's almost legendary for how much they cost to keep on the road. You'd be a very brave man indeed to own that 7 Series out of warranty! Great engine though! And the Volvo isn't a V8 and doesn't have anywhere near the options of the Lexus (or the BMW). And it doesn't feel as luxurious as the Lexus or the BMW. AWD is a nice bonus though.
I understand where you're coming from of course. But it's rare to find cars with all of the things you'd want in a luxurious GT car...especially when factoring in price, reliability, quality, etc. And the GS430 has been chosen as the best used buy in its class by JD Power and Consumer Reports too (IIRC).
While we're on the topic...what would you buy for $12K?
