5860
I just got a 5860 at BB and love it. Between Futureshop and BB, it seems to go down to 549 fairly regularly and once in a blue moon hits 499.
The only difference between a 5860 and a 657 is that the 657 has the zone 2 output.
If you bump it up to a 757, you get an extra 5 Wpc, a supersnazzy remote and an extra analog input for your turntable (and the zone 2 output you gained with a 657)