I must say I love the Herbert as well. Yesterday I spent 2 hours on CH2 - and it was like a whole different amp. For some reason I really never experimented with the CH2- but it is awesome for sure. There are sooooo many different tones in the amp it is ridiculous.
I'm not done with the speakers yet. I may go with two EV-12L 200W or stay with the mix of MS-12/Black Label.
The MS-12 is 150W and the EV is 300. Both don't move much even with the Herbert's massive bottom.