JBNich,
There are lots of rinses and mouthwashes out there. You just have to find out what works best for you. The most important thing to remember is to choose one that contains no alcohol.
The Miles/Dukes you are using is a good one. The maalox acts as a lubricant and antacid, lidocaine is a topical anaesthetic whish helps to temporarily relieve pain from minor irritations and mouthe sores,benadryl is an antihistamine that stops the production of histamine that contributes to pain and inflammation so that healing can occur and nystatin is an antifungal that will stop and/or control "thrush" or candida outbreaks.
Other products like the Biotene line are very good and relatively inexpensive. Brian has a link in the dental section to the Biotene website. They will send you free samples by mail if you ask. Oral B, Closys, and Breath Rx to name a few more, are some of the products I have recommended to patients.
Anyone who is experiencing any level of dry mouth should consider a rinse that contains Ph neutral sodium fluoride so that the teeth stay healthy. Stay hydrated too, drink lots of water.

I hope this is useful.

Cheers,

Mike