Some of the mavic offerings are pretty nice. I've got a EN521 on the back, which would probably be too much for non abusive XC, but if its quality speaks for other mavic products I would say give them a look. It was quite affordable too.
I've also had pretty good experience with WTB. My stock rear wheel was some XC model that took quite a beating before needing to be replaced. I still have the front one, and it has never had to be trued after over 3,000 km. I also was having trouble seating brand new tires on the rims. What worked for me was to just always pump a little above the max psi, let it sit a little bit, and then let some air out.
Last edited by ShimmerFade; 02-25-12 at 04:30 PM.