Not an old 456, but have a Carbon 456 which also has solo air Recons on them (130) and bit old with some cracks in the air assembly so looking to replace. I’m thinking of the new Pikes though :D. Think should go well on the c456 given the geometry, if I get a 140 or 150 Pike. Given the c456 also takes a tapered fork and the new Pikes are tapered. Likewise though, I need a bolt through wheel.
So new wheels, new forks. Makes me think should I instead consider just a new frame of the 650b variety and go 650b. Hmm. I really like the c456 though.