Re: trading question
Like scorpion1 said, all depends on which car you want.
The older GT's only had around 215 hp, so your V6 isn't that far behind it.
Reaching that level and above isn't hard to do if you want to, and have the pocketbook.
Your V6 might be a better DD (daily driver), but then you might not have to drive very far.
Also, why is the owner getting rid of his GT? You may want to look into that.