I am looking to purchase a new bike and am having trouble deciding between a few different ones. I would like to stay hardtail, but just can't come to a decision. Also am thinking of going with a 29r. I live in Tucson, AZ home of the world famous Fantasy Island. Typical trails in the area are very rocky and are strewn with cactus just waiting like a soft pillow of pain around corner for you to make a rong move. I am 6'1" 270 and will be riding 4-5 days a week, so something reliable is important. My choices so far are.

Scott Scale 40

Jamis Dakota XC

Fisher Paragon

Salsa Dos Niner or Bandito

Thanks for the help.