I own a pair of the Peavey Classic 50's and they are a great amp. I'm looking at changing the speakers (Blue Marvel), which in my opinion break up too soon and too much for heavier musical styles. They are meant to sound like the old Vox Alnico Blues.

The balance between the lead and normal channels is not real good if you plan on switching them much. It would have been nice to have a seperate post gain for the normal channel. If you're using distortion pedals and what not, it won't be a problem. Otherwise, this is a great sounding amp with good tube clarity and plenty of gain/volume from the 4- EL84's.