Grace,
I know that area as well as anyone. The SA Hotel as improved but frankly is not good value. Cahal Pech Resort has come on leaps and bounds recently. Ask for a good price there as trade in Cayo is very low at the moment.
If you want to have something at a less cost why not try Midas which represents excellent value and is close to town.
Aviod the lodges unless you are prepared to pay the price as they are far from town and you are not able to eat out etc.
E-mail me direct if you want a no frills opinion.
I have done quite a lot of management consultancy at many of the resorts and frankly think The Inn @ Xunantunich takes some beating. I can get you an excellent price there as I do not take commissions etc and you will have sufficient left over to cover a couple of tours etc. Plus they have a pool and is run by very socialable owners.
AmbergrisCaye.com 
