There's nothing wrong with any of those, as long as they have the features/connections that you want (and think that you'll want later on). Onkyo has had some quality issues lately, but I don't know the percentage of purchasers that have problems.
If it were me, I'd buy the least expensive one that has all the features/connections that I want. Okay, maybe that's obvious advice - but here's my point. If you buy the Onkyo for half the price of another one, then it's like giving yourself a free upgrade to another receiver in that price class whenever you want. That's not to say that you'll be buying one anytime soon, but the $800 receiver might be outdated in respect to audio codecs, connections, and room calibration just as quickly as the $400 receiver is. If you're going to spend $800 total, you could get an $800 one now and none later, or get a $400 now and another $400 later on when new features hit that price class.