I would go
Sherman
Dee-max
Saint maybe, other guy said hopes
e-13 without a doubt
Singlespeed...I dunno, I'm a big fan of having something to bail out on. If your leaning more towards freeride, maybe a cassette would work being that you would have to ride to where your going.
Tires...I dunno
This is going to be a bada$$ bike, I thought about going with the morphine but figured out it was WAAAY to much bike for Cen-Tex so I opted for the Surly. You have made an excellent choice frame wise.