I have this older Line 6 Flextone Duo 2 x 50 watts stereo amplifier that is in brand new condition. Unfortunately I hardly used it but I am trying to learn about it now. Is it considered a good amp? Is it powerful enough to play with a rock band in a club. You can save 4 tones, is there a battery used that retains the memory for those saved tones? Is there anyone who is using this amp or a similar Line 6 digital amp that can share the settings on some of the cool tones they made. I have an new American professional II Tele and play mostly classic rock. Which amp do you think would sound best with my situation? I can see that there tweed blues and there small tweed and black panel are modeled after Fender amps. Let me know. Thanks in advance.