The IRO wheels are handbuilt by velocity. I got the arrowheads and they have a sticker that says handbuilt by _____. I think some guy named jason signed mine.

As for the OP, how big are you? 200-220lbs isn't a huge deal (no pun intended), but 300+ is a different story. Any rim with a deep v section (like the velocity deep v) will be good. Any decent hub will support the weight. The problem with running a triple butted spoke like the 2.34/1.8/2.0mm is that you may need a special hub to make them fit. I would say pay the extra money for DT spokes, 14/15/14gauge, and have them tensioned by someone who knows what they're doing.

Edit: If you really want strong wheels, look for tandem wheels, since they can usually be found in 40 spoke.