The BC&F solar filter is really good and, as you'll see from the pics, works well.
Mine is 70mm as I use it off axis on my 200mm Newtonian with BC&F's focus-master. I'm sure you can get larger diameters that fit the larger ETX range from Meade.
Incidently, my Newtonian is mounted on a Vixen GP mount that I converted to Goto with Meade DS motors and AutoStar. Works very well, and didn't cost and arm and leg. Tracked the Sun throughout the transit with only minor adjustment, mainly caused by rough alignment only.