mike, thats a good choice!!
here, go check out this
review of the onkyo SR601. its a very good, informative review.. the 701 will basically have 100 watts per channel instead of 85.. it will have a few more digital inputs/outputs, and it is THX certified.. thats about the only difference. the 701 also allows for dual sound zones, and i dont think the 601 does that..
so, if you are still on the fence, go read this article.. i did a quick search, and the 701 is selling for between $575-$750.. just make sure you search for the best deal..
bigjohn