Tony I can't speak for the DV Mark or the Katana, having yet to try these. Despite modern manufacturing techniques, I am convinced one needs to try individual amps for some time before committing. I tested a Blues Cube Stage in a retailer's booth and was underwhelmed. It seemed relatively flimsy (compared with a Cube GX) at the time and the sound did not greatly impress me - definitely solid state thin. But I suspect that was perhaps just a one off. Certainly no match for the BluesBaby which I already had. The BluesBaby is a great amp. Likewise the BC Hot which I have also subsequently bought. I have no idea why I preferred the BB Hot to the more powerful Stage but it struck me as more substantial in build quality and testing under the same conditions sounded great. Perhaps my ears were having an off day with the Stage! The BB offers superb Brit grit whereas the BC Hot seems much more "Fendery" as one might expect. If anything lets down the Award-Session amps it is perhaps the cosmetic finish - they always look a little homespun but that is a very minor issue, especially if you are buying just the amp chassis.