OK, I pulled the trigger on a Kemper Stage and I want to share the reasons for my decision.
After tons of research, trying units myself and chatting with owners, I concluded there are 4 modelling amps worth considering - Fractal, Kemper, Helix and Neural DSP. While Helix is amazing and considered the "best of the rest", Neural DSP does not seem to have put their hardware on par with their software yet. That said, I had to decide between the two champions - Fractal and Kemper.
Trying both, I can attest that there is virtually no difference in sound quality (at least to my ears). Both sound like the real deal - it's incredibly impressive to hear just how accurately algorithms can replicate a whole signal chain and get all the details right.
So it came down to philosophy - do I want full control over creating my sounds by being able to tweak every single part of the signal chain down to the smallest detail (Fractal) or do I want a bit more simplicity and rely on others' profiles to get me to the sound that I want (Kemper). Especially after talking to TBurst Std, I was ready to pull the trigger on a Fractal because the philosophy appealed more to me - but it was pretty much a 51/49 decision.
But then I decided to go for a Kemper, and here's the reason...
I was born in Düsseldorf which is around 30 minutes away from Recklinghausen where Kemper's HQ (and showroom is). Recklinghausen is in the heart of the "Ruhrgebiet" which used to be Germany's beating industrial and economic heart for dozens of decades thanks to the coal mining industry. People in this area are known to be very honest and hard-working - the kind that is usually hard to find. However, since the 90s, coal production has mostly shifted to Asia and given the rise of renewables it's becoming insignificant. Hence, the last active coal mine "Prosper-Haniel" was emotionally closed down on the 21st of December 2018. This development has led to an economic downfall in the entire area. Having been one of the most vibrant and flourishing areas in whole Europe, the Ruhrgebiet is now nothing but a shadow of itself and doing very poorly economically.
Going to the showroom in the middle of the Ruhrgebiet, so close to where I grew up and looking at the coal mine on the Kemper logo (yes, look closely!), I made my decision: I want to support the local community and that whole area that I hold so dearly. As TBurst Std said, it's like deciding between a BMW and a Mercedes - both will get you class-A quality. Attached, there are some pictures of the showroom in Recklinghausen (the last one with a close-up of the coal mine on the logo).
Long story short, I made my decision with the heart and I don't regret it
