I just acquires the AI SL head and an Upshot, complete with backpack. I think the 16 and Upshot comparison is a good discussion to have.
I know the MAS gear is great. I owned a 26 for a while. Powered with an old AI head. It was great. Very well suited to DB. There is no doubt in my mind that Mike A. makes great cabs. However, with the Upshot it is different. I comes down to "sound dispersion" or "perception".
My gig on Tuesday, in a problematic room, was great. The Upshot was placed about 3 feet in front of me. I could hear myself clearly, and so could everyone in the room. Actually sounded good with the bow as well. In the past I have used a QSC K10 on a stick w/ EDB-2...a more directional setup. It always sounded great, and immediate, but not everyone could hear me because of the directional nature of the setup and room. The upfiring speaker definitely changed the dispersion/perception factor. I felt as if I was able to "mix" myself into the ensemble sound more effectively and play comfortably and confidently. I liked it.
The Upshot is definitely not "traditional". If you are looking for a traditional cab, but high quality and sounding ,MAS might be the ticket. However, if you are looking for a cab for low to medium volume gigs that is LIGHT, allows you to hear your sound in a different(dispersion and perception) but good way, and sounds great the Upshot might be a good option. Unfortunately, trying the gear is the best way to know if it for you. I know Gollihur has a generous return policy....: ).
The dispersion and perception of sound is the big difference. Am I correct?
PS - I'd go the "head" over "combo" route as well. Modular is the way to go. : ).