GP2...

Our charter rods are GL pelagic series 6 footers with the 40-60lb line rating (ours have 4 coustom guides in the tip section). These have 340 gti's (with 65lb PP) mounted on them, but I think I'd prefer reels w/o the levelwind. No roller guides. We use these for all the deep water spots off on Neah/LaPush. The are great for working multi-pound pipe jigs or fishing a slider rig with plastics. They'd be good bait rods, but I don't fish with it for halibut out deep.
Roller guides (tip-top and stripper) are nice, but thin diameter lines can work their way between the roller and guide frame.
I'm more of a fan of the Penn Senetors than I am of the GTIs, 3/0 or 4/0.
Stongly suggest finding a rod with a long foregrip and a shorter aft (Stand up style). Better leverage than normal styled heavy boat rods.
We'll be doing a halibut seminar at the Lynwood GI Joe's on March 27th. If you'd like some suggestions on hali tackle etc, I'd be happy to help.

J.D.