The Bugeras had an issue with Molex connectors arcing over. It has since been fixed in production, but I did have a 333XL from the first run that had this problem and I hardwired the connections. I kept that amp for two years after that and regret selling it. I will buy another one without a doubt. Selling that was a mistake.
The Bogner Alchemist, from what I gathered, just had something in the upper mids that didn't sit right with those two guys. They both said the same thing about it and didn't know each other. My buddy was saying that after playing for awhile, you really started to become aware of a harsh frequency between 1-2Khz and it sounded phasey. I had a listen, could hear what he was talking about, but didn't really want to spend the time with him tinkering with his signal chain to see what could be done or exactly what it was. A few months later my co-worker gets one and he says almost the same thing, couldn't dial it out, the longer I play the more apparent it seems, not getting along with it, feels wrong in the upper mids.
I'm not saying don't get it or it's garbage. I'm just saying give it a real good test, at least as long as you practice regularly. I'd have felt bad if you posted later on with the same problem and I didn't say anything. Hell for all I know it's power related, AC rippling or whatever, and your version might even have a whole different tranny than what they put in them for the U.S.A.