I'm roughly in the same place as you. Similar salary, little debt, and living w/ my brother for very little rent right now. My parents want me to move back w/ them since they have an otherwise empty 7 bedroom house but I just can't deal with the commute so I'll probably have a $600 a month apt soon.

I do have the benefit of a very reliable daily driver ('99 Prelude I've had since new).

Being an econ major though, I ran the numbers as soon as I had a job offer and as a single person you're very screwed in terms of taxes and disposable income as a result. If you dump a decent amount into the 401k and put away for a house, you don't have all that much left to spend on a new sports car and its requisite insurance. Most financial advisors don't recommend exceeding 8% of gross salary for a car payment which puts it just over $300 a month and that'll barely buy a base Accord new. Seeing as to how the avg American spends ~20% but ends up with a very limited retirement portfolio or 50k in debt when they die I just can't justify buying a G coupe or even the E90 I've had my eye on...at least not yet.

Trying to leave a G alone is going to be tough. Sure some deep lip on the Volks would look hot but then you have to drop it to make it look right and there goes another $1200-1500 on coilovers. Then the torque isn't there to spin those 60lb wheels and another 5k for a Greddy TT just seems so tempting.

I thought about going with an S13 shell and building a VQ powered show/track car but I'll end up with a 15 year old car that I spent 30-40k on and no ability to recoup those costs. Instead, I'll probably just end up getting my Volks refinished, repaint the car, and maybe build the H22 if I really want something fast.