[Mr Twisty]

Originally Posted by Congoman775

I plan on getting one of these as an aftermarket mod but im not quite sure as to the pro's and cons as they relate to each other... help??

I would wait and see what GM does, there may be a S/C motor in the works.
Biggest con of either from aftermarket is that it will void your warranty.
That's a good question but it's a little early. Both need under hood space that we don't know if we're gonna have just yet.