I need help deciding what to do for my next purchase. I have narrowed my selection down to two rides. The Specialized S.J. Evo expert and Evo.

I have been doing alot of research about 29ers. I have ridden a couple around the parking lot and through some neighborhoods. I am 5' 7.5" I would ride a medium. The bike feels freaking huge and sluggish.

I have also read that the wheels are not strong on niners. I've been riding 26inch hard tails for a long time. I'm finally game to trying a niner out but with anything new I am a little worried.

Thoughts Please.