Just my opinion, but get one that has the XT version of Audyssey Multi EQ. Older Onkyos have them, not the newer ones in your price range.
I believe Denon should have something at that price point hopefully, and they enjoy a more celebrated and reliable reputation it seems.
My Onkyo works like a champ, however.
Not EVERYONE likes Audyssey, but there are enough people who do, that I heartily suggest trying it. I loved what it did even after adding 8 large acoustic treatments to the HT, with more to come eventually.