Caesars daily tournament is not bad ($70 buy-in). Planet Hollywood has a new room with a daily tournament ($50 buy-in). These daily tournaments are pretty soft and not too expensive. Hope this helps.
There's a bunch of good tournaments in that price range. Take a look at the live poker room listings on this site. You'll see a fairly good description of all the weekend tournaments in Vegas. Just click on the 'room' tab at the top of this page.