I’ve been in the audience when the guitar players were using Kempers and they sounded great. However, I have heard that on stage experience can be ‘off’ as they lack the ‘feel’ of a valve amp. For my part, I used to use a lot of Tech21 gear (still use their preamps for bass) and never felt that they were lacking in on stage feedback, so I’m I do wonder if a lot of players do a lot of hearing with their eyes. The downside with valve amps and especially vintage ones is the maintenance and their susceptibility to damage when being lugged in and out of vans, etc. in addition, eventually the supply of valves will dry up, I understand, that with the current situation with Russia, valves are harder and, therefore, more expensive to acquire. If it were me, I’d grasp the current modelling nettle and get the box I felt most at home with. This is tinged by having a buddy who uses a Kemper for guitar and bass duties and he loves it. Either that, or find a solid state amp that I really liked the sound of; YMMV.