Here's a few other things to throw out there:
Mercury Marauder - OK, I know what you're thinking... Why would I want a (very) glorified cop car? Well, first of all, they're freaking cool. Secondly, they're quick and fun to drive for being so big. Thirdly, it'll hold its value well, in fact if you find the right deal you might not even lose money when you get rid of it. And fourthly, they're HUGE inside, tons of space for people, belongings, etc. The trunk is even larger, and could likely hold a small apartment, or 5-6 dead hookers (your choice). Plus who doesn't like 300hp and much much more available with modding?
Grand Prix GXP - Sorta like a worse version of the Marauder, 300hp and another 4speed auto, but this time going to the front wheels so no powerslides happening here. Not as big, but better on the gas. Once you learn to ignore the cheap parts of the interior(they're easy to spot, they're made from ABS plastic and stick out, it's pretty nice too. The leather/suede seats are fantastic. The LS4 in it is pretty much bulletproof (upgrading the same engine design for 30 years has a way of getting all the bugs out).
Lincoln LS (V8)- RWD, plenty of space, luxurious interior, but not a whole lot of performance. It'll entertain you, but it's not a drag race king. Which is a shame because it's a very fluid car outside of that.
The RSX is really tiny inside... You couldn't fit much in the way of anything in it. The base models are also absurdly slow. They feel quick because they rev to million rpm to get anywhere, and once they hit VTEC they get way louder, but they're actually very slow. My friend had one with a buncha bolt ons, and riding in it you'd swear it was fast as hell. Then one day I raced him in my old Explorer. Boy was I surprised when I pulled several cars on him immediately, continually (up to about 80, then he would get back closer), and repeatedly.
Ever thought about a Contour SVT? Way better car than either of those two, and MUCH cheaper. My best advice would be to go around and test drive as many cars as you can. You might come to see that the RSX offers no attributes to offset its small size, high price, and low performance. Classic Honda car (or Toyota).