For strict dragstrip use, I think turbo + auto tranny is the ultimate combination -- high midrange torque, no parasitic drag, and adjustable boost to match the need. However, street driving is a different matter altogether, and anyone who has driven a high-HP street car will tell you it's all about traction management. With 750+ RWHP, you can spin the Viper's rear meats up through the top of 2nd -- or 3rd -- gear, which means at street speeds you are constantly modulating the throttle when accelerating. S/C cars are superior for that venue because throttle modulation is far easier, and the throttle response is linear and predictable just like a N/A car.
As a recent example, look at the most recent supercar shootout in Car & Driver. The HMS TT car was actually *slower* than the APEX car 0-60 because it's so difficult to launch a big-HP turbo car on street tires. Once up to speed, of course the HMS car just ran away, but the test illustrates the value of a predictable, easily-modulated powerband in a traction-limited situation. The LPE TT cars have similarly been critized in past C&D and R&T tests; the testers end up putting race tires on them to make them hook, at which point they're ungodly fast.
So net-net: for "medium" HP street applications (<600 RWHP) both turbos and S/C are a good choice. For high HP street applications I believe the S/C route results in a much more driveable package. For the dragstrip, turbo + automatic is unbeatable.