The Yammie 663 should be out soon and I would choose it over the Onkyo 605.
As for speakers, you have to get out and audition as everyone's taste is different and there are loads of good brands to choose from. Some good storefront ones to check out are RBH, Monitor Audio, Paradigm, and PSB. Internet-direct is also a good option such as av123, Axiom, and Aperion.
For a subwoofer, check out the offerings from SVS and HSU. They aren't the only players in the game, but can't go wrong with them and they offer a lot of bang-for-buck.