[V]

my car is a cam only for the most part, and more obnoxious than you can imagine, and has an off road y pipe will full exhaust, anyways..

to break it down even more lets look at it this way...
to get the most potential out of each setup, power AND reliability wise, both builds will require upgrading a majority of the parts. Like mike said, what motor you build will determine what specs you get for those said parts.
-Both motors will require stronger connecting rods and pistons,
-better than stock fasteners like head bolts rod bolts etc.
-both will require a new cam
-both will need a stronger valvetrain, springs pushrods lifters etc
-both will need larger injectors
-a turbo motor you MAY be able to get away with mildly worked heads where a full NA motor would want better heads.
-turbo motor may not need full stainless steel LT headers(na motor could get cheap headers but...)
-both motors could use a worked/ported oil pump

so in the end, there isnt much difference what you may save on heads and headers, youll easily make up with cost of intercooler, turbo itself and the hot side parts.

It comes down to what motor YOU want to have. Either one is expensive when done RIGHT.

to quote what a friend always said... "cheap, fast, reliable... you can only have 2"