The regular profec B is definetly the easiest to use and is the best bang for your buck. The spec 2 is a little more complicated and costs more then the regular one. You can get them for like $230 on ebay
the greddy profec b spec 2 is the way to go, has some handy options like max boost to see if your spikin, and last boost, very handy dandy. might be a little confusing to use at first but once you get the hang of it, its pretty easy. there's a write up on here somewhere in the forced induction tech on how to set it up and what does what on it. comes with the manual in english as well. its also on their website. the TT manual is prolly on there too
