Speed PHreak

I was just wondering if someone could help me out with the various turbos. I mean I don't really know what the difference is between them. I'm looking for a smaller quick spooling turbo to push b/t 8 and 12 PSI. I mean there are -- IHI, T##, KKK##, TD##. I dunno the difference between any of them. Could someone point me to a list or jot one down for me about various turbo model and thier boost/spool characteristics?

woefully confused

~steven