Found what seems to be a fantastic deal on a Spark Audio Vacuum Tube Amp. The model number is 560 but i don't know much else about the band. From what i found this amp only pushes 60 watts two channels. But is 60 watts from a Vacuum tube amp a lot more than it sounds like. I am not too familiar with tube amps. I would use this to run my front Electrostatic Panels. They are currently getting 130 watts each from my Elite Receiver. What would be the advantages/disadvantages of running this amp to my fronts?