I played with, and loved, the pre-cat predator for many years. I've tried the g-core, ob-1 and 2 on several production cues. Performance-wise I was only dissappointed with the "soft feel". I have not tried the OB classic, Tiger, I-Core, or any of the others.
I now use a Mezz HPII on a custom with a wood to wood joint and it works well for me. While the hit isn't quite as stiff as my regular solid wood shafts, it provides me plenty of feedback without feeling like i'm using a marshmallow as a tip.
My silly banger ass carries situational cues and shafts, much like golfers carry situational clubs, to be used based upon course conditions. I still carry my predator for that lightning fast, "is this beer stained, what-used-to-be-felt, painted on slate" crap-box you occasionally run into in the bar league circuit.