To me there are pros and cons of both. I chose turbo because it was cheaper and easier for me. My budget is very small and I was able to afford the turbo. Superchargers are expensive but packaging is easier and there is less fab work. I don't really like superchargers because of the belts. You have to worry about slippage at higher boost levels then you've got a part to buy that will have to be replaced regularly. The gentle boost application of a turbo also has alot less wear and tear on the motor in my opinion. I have made my stcok 318 live with up to 18lbs and 30 deg. of timing on avgas, and the only failure has been a stock 35yr old head gasket (and a cracked piston, but it still is living with that). I am biased because of my budget on this topic, all my turbo parts came from ebay so I can't say how much good stuff costs because I know I can't afford it