I don't have the space for a large collection of amps! Not to mention, tube collecting is quite the money hole, I tend to go all the way to the top as far as tube choice goes. I've thought of building a Mainline or looking at another parafeed topology (the upcoming ECP T4 looks pretty interesting). I mentioned Ampsandsound, have not heard many SET amps and don't know how they compare to a good OTL. I have a Violectic V100, but it doesn't get much use, I prefer tubes.