I ride Supras (BH and D) and they hold up very nice and they're on the lighter side. Outlaws are great too, so are the halo tornados, arrow frx's and atomlab trailcorps. all those rims are basically different companies' versions of the same rim. I don't know a lot about the wtb's but they seem to be pretty popular these days. If I were you I'd look around and see what the best deal was out of those.
If you want outlaws on the mega cheap, look at performace bike's "loco" wheelset, its a 32spoke outlaw, same manufacturer, same hubs, and if you catch one of performance's sales they can be had for about $150/set. I bought a set as a backup wheelset and have been pleasantly surprised with them.
Im 200 lbs, ride freeride and have seen no problems with Sun Rims Single Tracks. well i did mess up a front but that was from a crash nosing in off a drop and the wheels were turned whrtn i hit, so i think i woulda messed up any rim. Also have a Bombshell up front now which has been working great.