First, Do not buy 10"rims unless you never plan on racing. Get tires with an 8" rim because theier lighter, taller, and have more rollout.
7 paddle hauler, 10 paddle glider (i think it was 10), 6 paddle extremes. you can choose a standard 8x8 rim or you can go with a 8x7 or 8x6. Those two rims will pinch the tires because thier 1 or 2 inches thinner and generally allow for more rollout.
Ive never tried the gliders or the extremes but i do have 6 paddle haulers. From what i was feeling last time i took them out, it may be a little underpaddled. For short races they arent very good because they spin alot at takeoff. For longer races like the sand drags at glamis thier just awesome becuase they dont have any resistance. Uphills they should do just as good. Any of those 3 tires i mentioned are great and youll be happy with any of them.
Oh and search please. Theres ALOT of topics on this exact question, probably 10 pages worth.