650b would be my ultimate choice just cos it's the best of both extremes. I'm still not in with this big wheel 29ers I just cannot see that something with 3inch more diameter and longer spokes can be just has strong has the other 2.
Massive flex in the front and back in tight berms and techy descents cannot be much fun but I'm gonna reserve my comments cos I've not actually tried one so I might be completely wrong
Matt do you go round the local trials at halifax? Been wanting to try some for ages but not had chance to get over, maybe you could be our guide
My gambler has been changed to 650b for the 2015 model so I might change next year