700c/29er
For really light work I have the FSA RD-460 Disc Cyclocross wheelset on-one Scandal. Now correct me if I’m wrong but the wheelset is for road type bikes 130mm axle width, whereas my mountain bike is 135mm. The main point is that they work really well and I don’t notice the difference in axle widths. I would recommend this wheelset for most of my easier roots as I’m too scared to do any proper jumps with them in case of a spectacular failure. If anybody else has these and is about 85Kg and is able to abuse these wheels to doing occasional jumps let us know.
And as for my Halo Freedom disk 29er- has its place (for the heavy duty stuff), however the rotating mass you will add to a bike will be massive and really makes a 29er feel like a 29er.
Also consider
American Classic 29er wheelset, Fulcrum Red Metal 29er, NoTubes ZTR Race 29er, Novatec TX 29er, Shimano XT Wheels 29″ MT75, Sun Ringle Charger Expert, Sun Ringle Black Flag Pro, WTB Speed TCS XC Race Fulcrum Red Metal 29 SL, Fulcrum Red Metal 29 XL