I've always owned Hondas ,from the atc 90's to the Foreman .
Couple years ago a buddy of mine and some his friends all bought AC 650 h1's and according to them all were happy with them.
I test drove one and decided to wait a while and see how the Cat worked out for them . We'll 2 years later almost 1500 miles my buddy's still satisfied with the bike. Aside from busted headlights (his fault),the bike's been great , pulls large tires with eaze , lots of torque.
I went and bought a 07 650 h1 and been happy with it so far , that said nothing beats Honda with regards to reliability IMO. By the way the H1 motor is a AC motor not Suzuki like the other models .
The Grizz is a better bike ,if you're willing to spend the extra $$$ go for it.
I bought my AC new for $6000 plus tax out the door , the new Grizz's were much more .
The other disturbing thing was that I spent the money knowing there are few places to ride.
Oh well thats another topic.....