Fantastic - I need to stop working on my car myself and drop it off at a decent tuner with a massive turbo and the instructions to call me when its 500bhp.
TBH, the less lag option would probably be best on a 200, esp with the power already in the 500's! Is it a .64 housing at the moment?
Evo's have that extra traction when it all comes on boost I guess.....