I live in Tucson, Az and use my Aleph 4 (500 watts continuous) all the time. Its worth it, its so sweet, smooth and fast. I bought a $12 110v whisper fan that sits on some padding (to make sure its quiet) which sits on a brick behind the amp, to bring it up to the level of the top surface of the amp. Although the amp is very hot to the touch, the surface of the shelf above (4" away) is barely warm. You can't hear the fan nor see it (unless you get down and look).
