In all seriousness I've been eyeing the C5 & C6 Z06 corvettes. The cost for these cars (used) is fairly low right now and I'm hoping in the next year or so the cost will be even lower due to C7. This would be a great budget track monster.
I also like the thought of taking an ls1 camaro and making it a pure straight line drag strip car. Possibly built engine, and either nitrous, supercharger, or BOTH. I just don't know if its worth the money sink to do that sort of project