I have a '99 GC Limited with the 4.7 V-8 and AWD. I've only towed a 1500-1800lbs, really old, rental trailer with a 2050lbs car, and kind of guessed at tongue weight, but it seemed to tow just fine, although I did have some trailer sway if you weren't smooth on the steering wheel (I didn't want to let my wife drive it though, because she isn't as smooth).
I have since purchased Air-Lift air springs for the rear coils that would allow me to put a little more tongue weight while keeping the headlights out of the trees. I do have Monroe Reflex shocks, which likely work better than the stock shocks. Bilsteins would be even better.
Oh, have you looked at any other aluminum trailers? Trailer world has some nice ones with open front decks.
David Avard
89 Honda Civic Si black (STS)
07 Mazda 3s (HS?)