I find it funny that kids that can't drive yet, are giving their insight on such expensive cars. Get your license, wreck a couple of mom and dad's cars, and come back with experience.
Anyhow, it's going to lay in your hands what you choose. Do your research (Edmunds is great), test drive a few cars and come to your conclusion. I have a 350z right now, and I know what you mean by needing to get something else. If you're looking for a type of vehicle like you're talking about - and you want to go Japanese (whoever the hell said an AUDI was a Jap car, you have your countries mixed up) I'd recommend Lexus or Infinity. Like Advertise Here said - you just can't go wrong with Toyota-made dependibility. Infinity's FX35/45 are sporty cross-overs, and are amazing vehicles as well.
Again, we can tell you what we like, and the teenagers here can voice their unabashed opinions on what they 'think' they like, but it'll all come down to your preferences, comfort with the test drives, etc. Last but not least, don't take advice from some of these kids that dont even have a license, and think an Audi A5 is the be-all/end-all... lol damn kids these days.