I currently have a GF Marlin Disc. I've had the ride for just over a year and love it. That said I would like to either upgrade the Marlin or get a GF 29. Since the Marlin only cost about $750 is it really worth upgrading? Instead of upgrading I could get a X-Cal or Rig for only a couple more dollars or if I wanted to drop a little more get a Paragon. Any and all advice or suggestion are much appreciated.