Wes,
We just have the standard 6xas. I really couldn't tell you which is better FM or PCM. I know with the PCM you cna program a safe mode function into the radio so it will hold pre-determined settings for the control surfaces of the plane. There's alot of treads out here pertaining to the subject. Heres a link to one
http://www.rcuniverse.com/showthread...803&forumid=27]