I'd be real careful before buying a Sony x000 ES series. When I was researching about a month ago, I couldn't find anyone on the net saying anything good about the ES (though alot of people were perfectly fine with the cheaper STR series).
I ended up with a Yamaha myself, but a Denon 2805 or Onkyo 701 or 801 would be worth looking into as well (unless you have Klispch speakers, in which case I'd exclude Yamaha as they don't match up well).
Things might have changed, but do your homework.