I went last September and stopped at the Luxor.
It's not a place to go and scrimp if you ask me. Live it good and live it Large!
When I go back I would stay at either the Mandalay or Ceasers Palace this time. I went for 10 days with the missus and blew about £2k over and above the hotel and flights and that wasn't going truly overboard.
Awesome place and well worth boning up on exactly where to go before you get there, so you can plan the trip etc.