While I've not dealt with any other stained glass workers previously I have used these guys several times for some small projects.
Located on 45th in Wallingford (across from Dicks)..
All of my small project's outcome have been far from cheap but Ive never had regrets and they are nice and work quickly.
They have some pretty amazing glass. Stuff that I didn't even think possible. They have a shop there that I'm pretty sure would take on just about any project you are willing to pay for.
They do also teach classes there regularly.