i can say these few things

1 super chargers are good for instant responce they are reliable and good for either tranny manual or automatic

2 superchargers have one downfall they will only produce so much power you can only get about 20lbs of boost max and then you run the risk of detonation if you get an air leak in between the carb and supercharger

3 turbos on the other hand have unlimited capabilitys if installed correctly, you need a intercooler but the most important thing you need is an oil cooling system because the turbo unit is cooled by the engine oil and because the exhaust is used to power the turbo it gets the oil temprature up very quickly and needs to be cooled

me im going run my oil through a new air conditioner condencer to keep my oil temp down

but you can have up to 50lbs of boost with out no problem
im going to say thin you may beleave me on not but there is a mustang in georgia that has a 351 windsor with twin turbos running about 40 lbs of boost and he is getting 2200hp and ill say it again 2200hp at the rear wheels i didnt beleave it untill i saw the dyno reedout from a few runs, months apart

you can run turbos on a daily basis and can have decent fuel milage if you drive it normally and have the power when you need it, but for launching the car with turbos you definatly need a stall converter or manual but with a manual you have to be carefull when shifting because when boosted the engine revs much quicker than a blower or as normal engine

just make sure with either way you decide you must have a real good strong bottom end with lots of fuel and ignition but i didnt have to tell you that thats a given