I spent a couple hours trying different pedals into the front of the Katana Artist, and honestly I prefer the Katana by itself. Then I spent a couple hours running the Axe FX 3 into the Power Amp In...and I still kind of like just the Katana by itself. It has a little more weight behind it and is just zero fuss to get at the sound.
The Crunch channel is really versatile, going from clean to edge of breakup to a medium crunch tone. Then I found if you set it to edge of breakup and the Booster to the front end, you get a a really nice modded Marshall sound.
Which is now causing my head to spin a bit, because I have like $5,000 worth of modelers and pedals but the $450 Katana Artist sounds basically as good, running through the same cabinet. With way less tweaking and no option paralysis.
Now a caveat that I'm playing at bedroom volumes at home, so definitely not saying it's the end all be all amp, but the fact it compares favorably to this mountain of gear that I have at home is just throwing me for a loop. Seriously, I went through half a dozen OD/drive pedals, several different modelers, three sets of studio monitors, a dozen or more headphones, etc. And I think the Katana might work as good or better than any of those for everything I do outside of recording.
Definitely need to return the Katana 50 and might pickup the matching footswitch to see how I like that. Also want to tinker around with running the HX Stomp in the loop for effects only.