Well, if you want to do a turbo or sc later, I'd go for an i/h/e setup since that will really help out once you need that increased pipe diameter. With a turbo you'll have to ditch your header and intake though so, you could either wait till turbo/sc or have an aftermarket header and intake until you save up for forced induction. If you end up going all engine is when you'll keep your header and intake. (or sc)

 

consider building your own turbo kit. I did that on my car and it was like $1,500 bucks. And way better than a new car, trust me.

If you're serious about turbo, I'd save your money and start piecing a kit together piece by piece. And another plus is you can spend maybe $200 at a time (or so) on each part untill you've got what you need.