A couple of days ago, I tried a Fender 300 tube amp. And what can I say: IT WAS A VERY NICE EXPERIENCE I loved the tone coming out of that amp. I have also tried a SVT. It didn´t sound as good as the Fender head but I tried the SVT with a pretty bad sounding bass. I have read about different tube heads here on Talkbass and on other places on Internet. Everybody says: This amp is awesome!!! Here´s the question. Can you tell me about the differences between the most common tubeheads? SVT, Fender 300 and Mesa boogie 400+ are the amps I have heard most about. Feel free compare them to other tubeamps.