Doug, Take a good look at the Rigid sander at Home depot. I got one about 4 months ago and have LOVED IT. It has all the round drums PLUS the belt sander. That is a HUGE BONUS in my book. I use the belt attachment way more than any of the drums.
http://www.scrollsawvillage.com/topic/8283-new-sander/?hl=%2Boscillating+%2Bsander