I really quite like Blackstar, my HT5 does everything I want it to. These new amps are interesting and their power scaling feature is very appealing, from the descriptions I've heard it sounds like power scaling rather than attenuation so shouldn't leech tone when adjusted. Only a test drive will tell.
I loved the big 100W Plexi type head but my quibble with the amps is that they seem to use too much technology to do relatively simple things and so it can take ages to get the sound right. When it is right though it's fantastic. I feel they're concentrating too much on doing it all and not enough on doing the important things properly, some one needs to teach them the K.I.S.S. principle.
