Turbo charged or supercharged ?
It is really up to you... In my opinion...
If you are looking for the SHIOK-ness, i think you should go for TC. Its SHIOK when the turbo kicks in ...
but as ppl say, supercharge is more stable, as in the case where you are going for short circuit sprint, where there are alot of bends, lots of braking and accelerating.....etc.. , where throughout the whole course you wont hit very high speed (for example, over 150km/h), the go for Supercharged. this is where the "stableness" of supercharge comes in.
however, if you wan the "stable-ness", you may also opt for purely NA setup...
If you are going for a real circuit, such as sepang, where there are a few stretch of straights, that you can really hit over 200km/h.. then go for Turbocharge.
the above is jus my opinion...