If you read Linc's 200 post about turbo selection, he explains in layman's terms how to read a turbo map. There is not really much to it, and it would be helpful for you when searching for a turbocharger. There are a few sites that have maps for most turbo compressors out there, the turbine side however is a bit more of an educated guess, but a .63 hot side should be about where you want to be.
That's my 2 percent of a dollar anyway. We could give an opinion if you had the the specs of a given turbo instead of a vehicle from which it came, trim numbers and A/R's and such, but if you can read a turbo map you wont need any stinkin' opinions. 8)