My car is having problems which I don't think I want to deal with it anymore (96 e36 with 150k miles). I'm considering another car, what do you suggest?

I only have a few requirements,

probably used but relatively a new model (preferably under 20k or so)
reliable
no fwd
something easy to look at and sporty
easy on the gas (meaning no big trucks)

so far I have 2 that I'm considering,

used sk2
used 350z