I would stick with Denon or Yamaha. Onkyo seems to be defunct, so I would be super wary of what they have out there these days.
Sony just seems to be so-so with their sound and amplification section. They certainly aren't a first choice product of enthusiasts. Maybe this isn't deserved, but it is certainly the case.
Denon seems to be one of the most well loved brands, but I've seen their share of blunders over the years, which are not the same issues I've had with Yamaha. But, I do believe that Denon has a better amplification section.