Mark;FYI division 11 has adopted a new H16 class for the 05 season. The new class is the brainchild of Chris Begrow. It is call payload 700 and basically means that the total weight of boat and crew is greater than 700lbs. Im sure the guys would love to see you come out and sail in the 700 class. Consider it cross training for your T.
On the technology question I agree with Bob, Faster doesnt mean more fun. Before I came to the US I sailed in the 505 and Tornado classes. When I got here I was disappointed to discover no active Tornado class in the area. After a few years racing Prindles I ended up in the Hobie class. Its not about the boat for me. I will sail in whatever class is best organized and offers the best access to good OD (and I consider formula OD) racing. In this area that means a Hobbie. Sure I would like a lighter boat but until one comes along that offers better racing opportunities than I can get with my H17 it no going to happen.