I have been considering the 4360 also, I don't really know of any downsides to these amps other than the price and the fact that they have no internal crossover(but this considered a plus for many that run external processing). As far as the current load of these tube amps, it isn't really a problem because the tubes run off a 12 volt plate voltage; therefore the draw is about the same as a solid state amp. I think the reason that they havent really caught on is because so little people know about them, and therefore maket for them is relatively small.