I haven't made a proper review thread yet because I've still been wrapping my head around the whole thing lol. I'm so overwhelmed, and I DEFINITELY wasn't going to make one this weekend, I was just lost in tone all weekend haha.
Major problem: so far it is in my apartment and I can't move it to the rehearsal space until next month. I can't turn this thing over 1 or I'm pretty sure it'll level my entire 3 flat. So I haven't TRULY heard this amp yet.
What I have heard of it so far: O....M...G.... I will need a few weeks to recover from my full body orgasm, I feel it may have left me a cripple. I have never heard a better distortion or clean tone.
Channel 1 has a really sparkly, clear tone. Very chiming. I'll be using this a lot. It plays really well with my reverb also, which I love.
Channel 2 is it. This is what I've been searching for. The closest I have been able to get is my Fender Bassman 10 w/ Boss Metal Zone pedal with Whizzer mod's "Diezel mod". The mod Whizzer did on that pedal gets surprisingly good results. It even has a -/+ switch. That pedal though (expectantly) is very 2 dimensional though compared to the real deal. Playing through this amp, I realize this is the tone I've been questing for and I'm addicted to playing the guitar now, can't get enough of that sound. The sound is very three dimensional, and I can hear each and every string no matter the chord I play (which has been an issue in the past- sometimes certain notes get lost in my chords as I use my pinky to play octave chords a lot). What I've achieved with my Herbert is a very three-dimensional, layered, aggressive sound, full of chime and sustain. The bottom end sounds great, but suffers from my room constraints at the moment and I've yet to really hear how tight the bottom is.
I haven't used Channel 3 too much yet. I've only had time to work through 1 & 2. I have some songs that are more aggressive and metally/doom and I can definitely see utilizing that channel for this (I am thinking my Fernandes Vertigo will love this channel, especially with its Sustainer pickup* - and yeah, I will post pics of the Vertigo later, I haven't forgotten!)
All in all I really like the way this amp handles all my instruments also. I can go from my Schecter (Seymour Duncan JB/Jazz combo pickups) to my Burny (same pickups as Schecter), to the Vertigo (Sustainer and stock pickup) to [and this one floors me] my Strat (Lace Drop 'N Gain in the neck, Lace Red in the middle) and it will handle them all and pull out the guitar's true potential.
Simply amazing, that is all I can say. I am definitely very, very, VERY pleased with this purchase. And so far I am loving the V30s in the cab. It is hard to gauge though because I haven't heard the K100s. So far I am not seeing a reason to switch though, or even X pattern.
LOVE this thing! Once I get set up in the rehearsal space I will post some sound samples.

Right now I just need a footswitch and I will be all set to go. Also: One of my favorite pedals, and part of my sound, is my Boss DC-2. I am losing A LOT of definition out of this thing though. It doesn't seem to color the sound as much as it used to. I am not sure if it's because the amp isn't loud enough (that seems unlikely) or if I am utilizing the loop wrong (seems unlikely as well, as my other pedals seem to be affecting the signal the same).... I don't know. I saw the section in the user manual about loss of dynamic range in the effects loops, so I will read up on it.