Denon or Marantz are probably your best bet if you're fed up with Onkyo, although I wouldn't be confident support will be any better. If you have room in your budget, consider the Outlaw separates, who have customer service/support on par with Axiom.

If you're willing to sacrifice the 7.1 (i.e. haven't bought the speakers yet), I will reiterate my broken record suggestion to consider the Arcam receivers. The performance on music is night-and-day better than Japanese units.