Going back over the previous 4 pages, two main differences appear to jump out from CSX fans.
1. Power..to me an extra 10 % hp or torque (in a heavier car) is not worth it....really, who drives these cars? How many end up on real race tracks (not the imaginary ones you fantasize on your way to work in the am). The base Civic has plenty of real world power..more than adequate for highway passing, even up-hill...if that's not enough for you, you are probably driving like a lunatic or just jealous because your buddy has x more hp in his _____. One thing I did notice about the last Civic though...VERY prone to cross winds on the highway...to the point it's almost scary.
2. Leather seats, HID headlights and nav systems do not make a luxury vehicle..just ask Hyundai. Personally, I love heated seats but hate leather seats...too damn cold and slippery in winter and hot and sticky in the summer. Xenon lights are great but stock lights are much better these days than when DOT regs tried to repress the imports. I've never used a nav system other than the handheld GPS I installed in my truck 10 years ago. It's a truck I use 95% on logging roads. I wouldn't take the time to learn the nav system in the CDX and I don't think most owners would either. But I don't live in a large city either, I know where I'm going.
My vote is still that it's not worth the $$. Well...maybe for my grandparents puttering around town and wanting to feel a little extravagent.....