When you start to believe that the best guitar speakers are already made, the Blackstar HT-21VOC MkII comes along. It is just the right combination of everything. Right size, great design and sounds wonderful. Perhaps everything one will ever need. I like the open / closed housing option a lot. It is a clever feature for experimenting with sound. The option with some more expensive Celestions would probably be exciting as well. Personally, in addition to the 4/16 Ohm input, I would also like the 2x8 Ohm connection option. (I know it would not be a “stereo”, but in terms of impedance it would be a nice feature.)