Turbo's are OK. Not many moving parts to screw up, they run off exhaust gasses, so they are a great power adder that does not rob torque to do it. But the engine needs to be designed for one or they totally suck (proper valve overlap, timing, etc). I don't particularly like them because they take time to spool up unless you go with a staged, multi turbo system. But, when they get to speed, hold on...

You really want one of these, you know you do, just buy one...(video posted at the Z06 forum I lurk at)

http://www.youtube.com/watch?v=t7kk0pfpFcI