Lucky for you the mistake was with your least expensive piece of equipment (the Onkyo).
Can we factor in any of the "to be sold" TX-NR515 money in your budget? I'm guessing it would net about $150 used.
The need for 3 HDMI and USB inputs will likely limit you to the big box store type units.
If you're willing to forgo USB, lots of owners are unloading their Emotiva UMC-1s in anticipation of the XMC-1. They're going for about $350 used. This, and your Onkyo sale would leave you with enough leftover to take the wife out for a nice dinner...or fixing that car...or paying those bills.
I'd also recommend the Emotiva MMC-1 if you can find one. Has HDMI pass through only, but certainly a reliable unit and an excellent value.