Have you looked at the Denon 3805?
It is currently being phased out as the new 3806 is in now, but the sound quality is awesome. I had one on hold for me at Tweeter for $788, but they goofed and ended up losing it (ended up getting the 3806, but would have been very happy with the 05).
Search around for the 3805 and grab one - should be able to get it for less than $800 if there are any left. It's 7.1 and has three zones, so the pool area would be a completely separate zone (ie. you could play Green Day into the zone 2 pool area while listening to Forrest Gump in the zone 1 theater room). From what I understand, few places are authorized Denon dealers, and buying unauthorized means no Denon warranty. I know that Tweeter and Crutchfield are authorized, but beyond that I'd check directly with Denon before buying.