Katanas can be had all day in the used market for 100-200. The mobile app and adapter makes it a no brainer, for me.
So many options, signal path flexibility, USB interface, and all the effects one could want. Dual delay, at the same time. More amps to choose from, in the editor.
Also can use the app as a virtual multi controller....oh and it has synths available.
I know it's not the best sound, compared to a tube amp, but, for little expense ..the functionality is insane. Just way more than people realize. If one can't make it sound good, the problem isn't boss.
P.S. it also has the slicer in there ....which is worth the price of admission, for me.