Glad I can be of help, guys. Right now I am using- and absolutely ENTHRALLED WITH- my PRS Sweet 16. I picked it up at XPRS last Sept. I wanted a lower-wattage amp on which I can run the Master all the way up without ears bleeding, and I LOVE the SW16. I didn't think I would, because I've played 2 of them previously (the older Rev's of them), and was not happy with them. Speaking with Doug and Junior at XPRS this past year, they were telling me how this latest Rev had been significantly updated, and I demo'd it and just LOVED it. It is more than loud enough, and I get WONDERFUL output tube saturation and distortion that I just love. I also have a PRS 2-Channel C (one of the first 25 prototypes from 2010), and I have an original '78 Marshall JMP.
I've had both a Super Dallas and an HXDA, and I loved them both. I just found that they were too loud for me to run with the Masters dimed, plus- I have a Marshall that many consider "legendary", and the SD and HXDA- though more versatile- seemed to be redundant. I really don't need any more 50-watt amps; I'm covered there. My Marshall sounds AMAZING. It is everything that a JMP should be. I needed a lower-wattage single-channel amp, and the SW16 suits me PERFECTLY. It sounds louder or quieter depending on the size of the cab that I run it through, so I have all the versatility I need.
I do still LUST for one of the 30w HXDAs... might have to check one of those out at some point, because I liked the HXDA that much. If there was a 15-20w HXDA out there, I'd probably have it instead of the SW16. However, changing an HXDA to wattage that low would likely necessitate a change to the tubes, the transformer, etc... so at that point it's really NOT an HXDA anymore, is it LOL!!?? I also am VERY interested in Grissom's new amp... The rumor is that there will be a 15 and 30 watt model, so I may end up coming home from XPRS this year with one of those, if they are done in time. Guess we'll see...
If you have tried one of the Sweet 16s previous to this past year's XPRS event and thought they were just "meh", or even sounded outright bad, do yourself a favor and give them another chance now that they have been updated. It's a whole new animal now. I'm real happy with it.
As always, if any of you want to talk in detail about my experiences with any of these amps, don't hesitate to shoot me a PM and we can get on the phone and talk more. Happy to share any info that I have!