A few more updates. I picked up a cheap wheelset. I wanted something on the cheap side but still decent quality and wide. I found the WTB i25 rim with SLX hubs for $170 new at Jenson. 25mm inner width. A bit on the heavy side, and the hubs are centerlock so I'll need adapters, but will work while I learn how to do this MTB stuff. I've still got to pick up a cassette, chain, and seatpost.
A couple more weight updates:
Frame - 17.5 BB30 = 1111g
Rear axle - 74g
Rear wheel - WTB i25 ST - 1207g
Front Wheel - WTB i25 ST - 1052g
Chain ring - Wolf Tooth 32t- 48g
Saddle- Selle Royal Seta (spare road saddle that came with my Cervelo) - 298g