Superchargers suck; especially the offerings for our 4 cylinder cars. You either have the piece of crap JRSC or you have the overpriced and overrated Vortech supercharger.

I don't know where you are getting your info about a turbocharger giving power for only a short amount of time, but it is wrong. A properly sized turbocharger will give you decent gains in every part of the powerband and will spool quickly enough that you won't notice the lag.

I highly recommend you do a good amount of research into both of those options because if you want your engine to last, it will be more than a bolt on affair either method of forced induction you choose.