You could go with monster gt 40 with the billet wheel so it flows like a 42 like the one Chris sold me :-). That thing pulls like a freight train. Running e-85 again and after 600 miles since rebuild she's busting my 315s at 17 lbs boost in 3rd. This thing is all concentration. Dyno fine tune next week and we'll push into 20 lb realm

^^^ nice!

Nice idd! overkill for my car I think ... :-)
Found some good info on Borg warner performance turbo's.
Not sure if it's useful. Anyway here it is:

http://www.turbotekniikka.fi/PerformanceTurbochargerCatalog.pdf