Team 1923 did fairly extensive testing with different wheels and speeds and we found that we really liked the banebots wheels, but as others have said we found that they wear down too fast and we saw that they were no longer in stock so we went with our next best alternative, 4" Colsons from VexPro. We also really liked how the 1/2" Hex hub mates with all of the hardware we had ordered earlier in the season.
You can see how we implemented them in our reveal video:
http://www.youtube.com/watch?v=3yZNMJwGQEw