vtec is a marketing gimmick for the most part. but it fucking sounds awesome, and if you can have aggressive cam profiles while still retaining a stock idle and good gas mileage then why the fuck not? in my opinion it's worth it. i've been driving around with a high-lift, high-duration cam in my car for about 6 months now and i'm really getting sick of the shitty gas mileage and having to put the defroster on every time i come to a stoplight to keep my teeth from rattling out of my head. but the extra pull at the top of the rev range is wonderful. i fucking WISH my car had vtec.
but i still see the point of this thread, it is alot of extra money, and perhaps a bit overrated. for turbo cars, i don't see why even bother with vtec.