Just a quickie:

Are the turbo's found in 3000gt/gto's any good? I believe they are 9b's. I know they're kinda small but I'm not after a high PSI application.
Found a pair brand new for US$800.00. What do you guys reckon?

Cheers.

you can get about 14psi out of stock ones but that's pushing it.
for $800, I would not bother, you can get 2nd hand ones for about $200 of www.3si.org.

I'd still be looking at a single turbo, Talk to ARS55 about turbo sizing or start a thread and see what people have to say.

3si.org and eve club3g (I think thats it) would be good places for you to start researching sizes/models/other rides.