Have you considered using priceline? I just did for the tail end of our Feb. trip and got the Renaissance (across the street from SeaWorld) for $95/night. This is a 4* hotel/resort.
You might try Doubletree on Major Blvd or Hyatt Place on caravan ct .
Never stayed at the Hyatt but I have the Doubletree and its a nice hotel and has reasonable rates
hope this helps
I stayed at the Sheraton Studio City in August 2007 and really liked it. I got it on Hotwire for $52/night. I limited my search to a 3* in the Universal area. I would definitely stay there again.
The Hyatt Place on Kirkman rd in front of Universal or the one on International Drive close to the convention center..There are tons of good hotels on International Drive south of Sand lake rd going towards Sea World.