Since the room is not very important to us we stay at the Imperial Palace. Middle of the strip across from Caesar's. Nothing great, but the rooms are clean and cheap. (This is one of the older hotels, the rooms are much like you would find at Motel 6 or Comfort Inn) We get our room comp'd because we've been going there for 15 years - but the rooms run about $35-$40 weeknights and $70 Friday and Saturday.
I would love to stay at one of the higher-end Hotels like the Bellagio or Venetian, but since I only go to the room the shower and sleep, I'd rather spend my $$$ at the casino and on shows.