The Palms Place Penthouse suites may work for your party as well -- large, private pool and terrace and views of the Strip.
For that kind of money, why not consider some of the larger suites at Caesars, like the Forum Tower Emperor's Suite -- at least your room and incidentals will give you reward and tier credits with Harrahs
Alternately, for that kind of money, you could get fantastic suites, with service to match, at Wynn, Encore, Bellagio, Mansion and SkyLofts at MGM Grand, and the Four Seasons.
Regardless, hope your party is a success and please do report back where you ultimately partied.