Your description of the build quality sounds awfully similar to the Marshall JVM. Although if looked after, these types of amp can give some reasonable service.
Personally, I would still like to try the 333 head, through a good cab. Even a Bogner through cr@p speakers or cab will sound poor. Also, their 6262 is apparently a very different circuit to the 333.
Even so, Oli, thanks for your review. Looks like I'll be avoiding the 6262 (or any of their combos for that matter).