So, I've played almost every high end high gain amp ever made. Mostly as a function of knowing lots of people, and working in a handful of nice studios with connections - although I've owned a couple of the "heroes" myself for a time. Almost every one of the legendary expensive amps has something to recommend it. Larry palm mutes sound like nothing else. SLO lead tones are sublime.
The Metaltronix is one of the worst sounding guitar amps i've ever played.
I's a noisy mess, theres way too much treble, it can't be dialed out, and it sounds like a stereotypical "80s metal" patch on early modeling devices from the 90s.
I freaking love the Crate Stealth and the Perfect Connection was one of the best under-the-radar preamps available before COB blew up. I'm not saying this because i think Lee Jackson is a retard or something - on the contrary I think he's made some amazing stuff. There's just no amp with that badge on it that i would spend two thousand dollars on, let alone ten.