For the type of riding you do the Heritage would probably be the better board or even the SL. I was not very stoked on the TRS when I rode it last winter; felt like you couldn't really push it too hard and although that compromises with it being versatile enough to ride in the park, if you're not riding ever in the park, then you probably want something a little burlier than that. If you like the Lib boards maybe consider the Gnu Riders Choice; it's a solid & stable all-mountain board.
I don't know anything about the Gnu bindings. Wasn't thrilled with the NX2s either but they were pre-production and Flow was still working out some kinks I guess so they may have improved since then. If there's nothing wrong with those Cartels you got last year, I'd say just keep those they're a fine binding for what you're doing.
Last edited by david_z; 10-28-2012 at 10:46 AM.