How are the Nissan CVT's? GM's are total and complete CRAP. The ones on the Saturn Ion and VUE are junk, and are pretty much going to fail at least once before the warranty is up. We do them all the time in the shop at the Saturn dealership I work at. Acura TSX's had bad reputations in the shop when I was working at the Acura dealership, but I'm not aware of any specific issues. The technicians would always make comments about "what a hunk of junk" they were whenever they would come in for service. They sure look nice though. Also when I was at acura, we were doing something like 7-11 transmissions a week warranty (that was across the model line-up, not just tsx's). I wouldn't want to get stuck with a bad tranny once the warranty was up...
On a positive note, I've got an 02 Altima that I've had since new, and put 90k on, that is very spacious inside, has been relatively trouble free (even considering it is the first model year of this body style), and has fantastic cup holders. The new SE-R altima has the same VQ35de as everything else nissan makes these days, as well as a beefed up suspension. Something to think about. If I were shopping for cars again, I'd be looking at a WRX wagon, but that's just me.