-with pretty low boost and proper tuning, no need to change internals...if you do want to lower compression, like everyone said, you have to also resleeve the block.
-there is no cooling option for supercharged preludes, unless you want to custom make one, so lb for lb, the turbo will give you more power with less parasitic loss.
-also, the costs will be somewhat similar for the jackson racing SC kit or a turbo kit, with the exception that the kit will be made to fit, while the JRSC will have to be modified....
-also, while you can increase supercharger boost by changing a pulley, it just creates more heat which you have no way of dealing with...with a turbo, you can increase boost as needed, so if you want to go back later and beef up the internals, you can just adjust the boost to match
-dont worry about cams unless you get some made for FI. if you're going to modify internals, do it all at once. the head can benefit from a porting and polishing, which can help prevent detonation, but it is not neccessary...just a plus.
basically i see no reason to consider a superchager