The V6 is nothing to sneeze at. I drove one at my dealer to get a "fix" while waiting for my 2SS. It is a sweet car and had plenty of power plus turns heads the same as an SS. You've made a great choice at your age. And yes, you can upgrade later.
With a few mods it will kick ass on most factory V8s, hell, it already does that.
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Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting "Holy shit, what a ride!"