If you want something cheap, get a late 80's Mustang 5.0. I had an 89 LX 5.0 I picked up for $4500. Mods are super cheap too...you can have a 10 second car for under 10 grand lol.
If you come into some money later, get a 93-98 Toyota Supra twin turbo but I warn you... used ones on the LOW...