What's the best?

Ok I want to get a cheap car (looking to spend 4-5 grand) that'll run a while. Now the big thing is, I want to make it fast later on. So what's the best car to do this with? I don't like Civics, but if they're the best I'll do what I must. I want to know what's the best car that's cheap now and fast later (fast as in 12.50-13.00s) and cheap to make fast (not cheap, but cheaper than the others).