I feel I have to speak up on behalf of the Behringer amp. I own one and have used it for over 2 years now. I also fix and modify amps for musicians. I put the BX3000T on my 400 Watt load box and it will put out 350 Watts all day long without a hint of overheating. In fact, the load box is the item that's showing the heating effects, as expected.
I find the various tone controls work great on the amp. Not much love anywhere for the Ultrabass....such an oddball effect.
I could not make the amp distort (normal input levels) when it puts out full power. Protection circuitry keeps the waveform clean...and that is the key to my personal tone preference...deep and clean.