If your going for street use, go twins. They use smaller turbos, which will let you spool up quicker(less lag). but they will also take up more space, and have 2 instead of one to go bad...
__________________ 89 lx 5spd 5.0 16 inch ponys, kenny brown suspension, drop spindles,dont know what kinda springs are in it, rides a little ruff but corners like its on rails, strut tower brace, kframe brace, subframe connectors,pan hard bar, c/c plates, baer disc brakes, cross drilled and vented rotors, p/p e7's, 1.7 roller rockers, 3 row aluminum radiator, k&n, silencer removed, jba headers and hpipe with cats, 2.5 cat back dynomax. | 
Single or Twin Turbo Pros & Cons ? 
