FWIW, I bought a Stumpy FSR Comp 29er in March, having test ridden a myriad of different bikes, including the Trance, Norco Optic, Focus Spine, Scott Genius, plus others.
The clincher for me was really about how I felt on the bike, in all terrain conditions - it just felt natural. Living in Tassie, we do a lot of climbing but also some awesome longer down trails and having the all-round capability, travel and speed of the Stumpy has been awesome.
Once i'd ridden it at Derby, I knew I'd made the right decision, the bike is amazing. Much more nimble than I thought a 29er could be, super-stable in the air and very forgiving if you mess up!
I'm 5'9, 173cm and bought a Medium - I'm so happy with the bike for my style of riding, I can't stop smiling every time I ride it!
I guess that's the thing here - YOU need to be comfortable on the bike and the right one will just "feel right". That was certainly the case for me. I was tempted to go the Canyon path and I may next time, but for my first big upgrade in a while, this was the right process to follow, resulting in the right bike for me.
Good luck!