I've now owned two YBA200 (the first model, not the 200-2) and a YBA300. I upgraded from a YBA200 to a YBA300 for more headroom, but I sold the YBA300 and went back to a YBA200 because the YBA300 had TOO MUCH headroom - it was crazy loud. I could get a much better tone out of the YBA200, which to me sounded like a beefier V4B. So, I've gigged YBAs now for 4 years trouble free - until recently. A power tube failed during a gig and it took out the auto-biasing circuit, which required a couple of hours of work from my tech but less than $10 in parts to fix. He's modded the YBA200 to remove the auto-bias circuit and now it has each power tube individually biased manually like the YBA200-2, so if a tube fails it won't take out numerous components at the same time.
I love the tone from the YBA200, and it dirties up very easily via judicious use of the gain control. Teamed with my sealed Markbass 410 or my Fender Neo 610 it's a perfect match for my old school tribute bands.
