Explaination of car poll

Alright, a little explaination about the new "car" poll that replaced my "next job" poll on the sidebar. 3 years ago when I started grad school, I made a promise to myself that I would drive my current car past 100,000 miles before replacing it at the end of 3 years, just about when I graduate.

Well, 3 years are up, and since this week is my birthday, I decided that it's time to start shopping for a new toy! Basically, my criteria was to be a luxury sports coupe... I like my heated leather seats, GPS, nice sound system, but I also want good performance, a car I can take to the track and have some fun. Coupe, because I really don't want to be driving around in a family sedan, and since I wear contacts, convertibles are not an option! (plus they don't let convertibles on the track)

Luxury pretty much rules out some of the lower-end, high performance vehicles like the Nissan 350Z, or Honda S2000, though I guess the Mazda RX-8 is still a consideration since it actually is fairly decent on the inside. I'm aiming for a budget of between $35-$45,000, and would consider used cars that are 1-2 years old, so no Porsche 911s xD

So... I'm currently considering...

• Infinity G37 - I like the styling, and the interior looks decent... I haven't test driven this car yet, but I did try the G35 before and liked it. I'm concerned about reliability though... any experience with Infiniti vehicles? I'm under the impression that they had some rough spots in the past. Cheapest among the luxury brands.
• BMW 335i - Very common vehicle in Northern California... good performance, but expensive >.<>
• BMW 135i - Smaller version of the 3-series, but with the same engine, supposedly an insanely fun car... but since this is the first year after the introduction, I'm pretty sure dealers will be overcharging as much as they can!
• Porsche Cayman - The runt of the litter! The Cayman is actually surprisingly rare... I've only see a half dozen or so... cheapest of the Porsche family, it has been around for 2+ years. This would likely be a used vehicle purchase since new, these cars still run over $50k.
• Mazda RX-8 - Only in consideration cos... well, I kinda like the styling, and there's something fun about pushing an engine close to 8000rpm when it's designed to do that xD Main concerns are the fact that the rotary engine basically burns oil, and it has not only horrible gas mileage, but also a tiny gas tank >.<>
• (New) Audi A5 - I'd forgotten about this vehicle... The only all-wheel drive on the lineup, another German vehicle. Styling isn't as flashy as other vehicles, but last fall, I had a chance to drive an Audi S5 on the Infineon Raceway just north of San Francisco. It hugged the track very nicely, and I could feel the advantages of the all wheel drive compared to the rear-wheelers I'm used to. However, I don't have any experience with Audis, nor do I know anyone who actually owns one, so I have no frame of reference for quality or service...

Any other suggestions for vehicles to look into? What do you think?

(P.S.: I put the poll up prematurely and did not include the A5 before someone voted for the BMW 3-series... If you want to change your vote, let me know xD)