Well, of course there may not be a best metal tube amp, but surely there are metal tube amps that really really stand out. The engl powerball has really caught my attention because it is in my price range, it sounds amazing, it has loads and loads of gain, it is very very responsive, and it can articulate each note very clearly, even when the guitar is tuned down (im tuned to C) and the amp has lots of gain. I played the "famous" dual rect and it was good, but it had a very plain sound to it. The engl had a different sound which I liked. I haven't tried any of the VHTs yet, but I hear they are pretty good, so I think I should try them out. Here is a video of me playing guitar http://youtube.com/watch?v=_PCmmbtnIf8 it is a good representation of what type of music/style I play. I play very technical stuff (like necrophagist) and I do lots of sweeps and arpeggios, so I need an amp that excels in areas like that. As you can tell the my line 6 spider can't articulate the lower notes very well (it is probably also from the mic on the camera too). Are there any other amazing metal amps besides Engl, Mesa, and VHT (I am assuming VHTs are pretty good)? Which metal amps do you guys recommend? Guitarists from the absence, what do you recommend and what do you guys play?