Rick,
If your focusing on the Messier objects I'd suggest getting the "Year Round Messier Marathon Field Guide" by Pennington. The field guide shows all the Messier objects with charts for finding them with a Telrad and other finders. It also has drawings showing what the object should look like in the eyepiece.
Since you have a dob a nice wide field eyepiece is always a good accessory when searching for objects. The 25mm should be a good start. You can use your 9mm to zoom in once the object is cenetered in your field of view. The first "eyepiece you may want to add after trying this method would be a good 2x barlow like a celeston ultima, Meade APO, or teleview. The barlow would give you the equivalent of a 12.5mm and 4mm when used with your current eyepieces.
Everyone has different opinions on eyepieces so it's best to try what you have and then look for ways to improve your viewing experience.