If you're gonna stay with the IHI models, definitely the vf34. Depending on your cash flow & where you want your power, I HIGHLY recommend the Monster Port vf34 from deadboltspeed.com. Mine was $750 + $150 for the port job but I think they may have gone up a little. To quote his website, benefits include "improved spool-up, improved throttle response, quicker accereration, quicker rise to peak torque and enhanced boost capability." I have a 4eat & needed more low end punch & it was just what the Dr ordered. Sounds cool as a bonus!