I came from an '01 Z51 six-speed Corvette Coupe to my GTO, and I'd swear the Goat's faster. Just seat-of-the-pants, really, but that's how it seems to me. With the Goat's extra heft and 50 extra ponies it's probably a wash.
Do you need a backseat? Do you care about ride height and visibility? Those are things to consider. I happen to have two boys, ages 9 and 5. That had something to do with my car swap.
The warranty thing would be a big consideration, too. I generally sell a car when the warranty's over.