Sheldon,
I booked at the Imperial weeks ago, but when I was looking for flights, I noticed a lot of good air + hotel deals on sites like Travelocity, Expedia, Side Step, etc. Might be worth a look-see. Also check out sites like
www.lasvegas.com. They list specials for various hotels, shows, etc. Also
www.hotels.com. Might want to check where the hotel is located, too, because some are pretty far from the Imperial. I believe it is near the center of the Strip. Of course, if you don't mind the distance between hotels, you can get a better value at a hotel off the Strip.
Rosie