We just got back from Bellagio and it was great. They are remodeling the upper floors so ask for a low floor to avoid the noise. Otherwise, it is a really classy place with excellent food and good pools. The wife loved it.
The best room for the money is the Venetian. Huge rooms and an interesting place. You never have to go outside. I like the rooms at Paris. When I go with the guys, we go cheap, but central. Bally's and Flamingo are good deals for decent rooms in a good location
Hard Rock Hotel has good bands now and then as does House of Blues. Check out the Lance Burton magic show at Monte Carlo for a reasonably priced show. There's always Celine (gaaaak), Elton John is playing soon. Check out this web page for a list of stuff.
web page
I fall asleep at O and other Cirque shows. I can only stand so much dark sleepy stuff before I nod off. I play poker so I like Bellagio and Mirage for no smoking card rooms.