I've got an '05 and really like it. It can be a bit hard to get parts for it here in the States, and expensive too, but I think in the EU it's much easier and cheaper (dealer markup over here is crazy). I've got some info about them here: http://www.betamotorcycles.net
Just got my motard wheels for it, haven't mounted them yet though.
It seems to be pretty good out of the box for motard. The front is divey, but what dirt bike isn't? The Marzocchis seem to be adjustable enough to compensate a bit. Only big problem I've had is chatter on the rear when backing it in, but I haven't adjusted the rear suspension at all yet so I'm hoping dialing in a bunch of rebound damping will help that. The handling is razor sharp, maybe a bit loose in the front end but not jittery, at least not with a Scotts damper.
FYI, if you want a 320mm front brake, the Husky rotors (WR250/TE450/TE510/etc) will fit. Not sure about the relocation bracket, should know in a week.