I've been obsessing over a 29er hardtail myself recently. I really miss and never ever should have sold this Gary Fisher hardtail I built up that weighed a little over 23lbs, using the DMC conversion kit (best 29er single speed kit out there that is also pretty reasonable)... I priced out Spots through a pro deal connection and am also looking strongly at a Ventana El Commanante aluminum frame to keep it in the family... My pocket book may be hurting shortly!
This was my first 29er and I would build it a little differently today (no RaceFace cranks and I weigh too much for Egg Beaters and use Time pedals exclusively now and try not to use a chain tensioner any more, but it was a good bike)...