OK look at it like this say you get the LS motor and everything else you need for the swap you might get a deal on it for $800- $1100. Then you want a turbo thats another $1800 at least. then what are you going to do to the LS engine put a VTEC head on it. Well shit you should have just spent the extra money in the first place to get that extra horsepower. There arent to many quality performance parts for an LS unless you do them internaly which can be expensive.
so go on get the VTEC.... you know you want to. And if you do decide to put a turbo on the VTEC you be in for one hell of a ride
just my thought