I've wanted a SLO for 15+ years. I can probably pick one up soon, but for the price I could get an Axe or Kemper.
I have limited time on the Axe, but when I played it, it did sound good. I've heard demos of the Kemper and they seem pretty great too.
I have no volume limitations at my house, I can run an Ampeg SVT at full blast any time I want.
An advantage to the amp is that in ten years it will be worth more than today, the axe will probably be worth a few hundred bucks.
An advantage to the modeler is that I get the SLO sound, plus a bunch more... But with the amps I have, I don't know how many others I'd use.
So you modeling guys... What are your thoughts?
Can't speak for the KPA, but the Fractal is also an absolute asskicker of an effects processor. Even if you don't use the modeling most of the time, you'll still have a boatload of top-end effects available for the loop of any of your amps.