Cosmopolitan..

has a nice view if you get a room that faces the bellagio fountains.
The weather will be hot during your visit but it is always nice in the evening to go out on the balcony and watch the fountains or other things
Vdara has a nice view if you get a corner room.
I am sure there are quite a few more but that is all I can recall at this time.lol
Have fun

Prop your chairs in front on the window, sip alittle champagne and enjoy the strip plus the water show. But if you're an early and light sleeper the noise could be a problem, but shit it's Vegas so...

Thanks all for the input, it does seem like the Cosmopolitan is leading the way. I checked out the room on the Cosmo web site, looks nice.

I personally like Mandalay Bay, MGM, Cosmopolitan, Paris, Bellagio, Caesars, and Planet Hollywood for great views!