Well, the boost controllers fall into two main groups, basic ones and ones with fuzzy logic and all kinds of options. Personally I like the Power Enterprise and the Profec b cause they are simple and work.

As for the others, the main ones would be the blitz, avcr, profec e-o1, and evc. I have not tried the new evc. I have not had as much luck with the blitz, however some people like the new one very much. The e-01 and avcr both work fine but are pretty complicated and tough to tune. The AVC-R also has some more boost related options. If you are going to buy new, I have one avcr in stock thats on sale...will match pricing.