I have a Gemini 2 that I only play at home and I don't record with it. It sounds great and I love the stereo capability. The power supply fan noise wasn't loud but it was "irritating" to me. Seemed the more I heard it the more it bothered me, especially playing at low volume levels. It's a really small fan so the noise was high pitched. So, I replaced the power supply inside the cabinet with one with a fanless design. I do electronic work in a power plant for a living so this was fairly easy to me. I would probably just pay the difference for the Studio version of the cabinet with the fanless power supply if you choose to purchase the Gemini 2 for use other than live, especially if you don't feel comfortable changing out the power supply yourself. And this could also void the warranty I would think although I could reinstall the old power supply if I needed to. I think the fan noise could be an issue for you in a studio enviroment though. But since you are using it live I wouldn't worry about the fan too much.
I also have a Marshall 4x12 that I occasionally run the Kemper through with a Camplifier. It does have a more "real cabinet" feel than the Gemini 2 but if I could only pick one I think I would stick with the Gemini due to the fact that its FRFR. The Empower knob on the back of the Gemini 2 does help the cabinet to sound more like a real cab or a true FRFR by just turning the knob by rolling off the highs. Another thing is the cabinet sims really do change the sound of an amp. I think people concentrate too much on the amp part of a profile when the different cabinet sims can really give you a different sound even with the same amp profile. A FRFR just makes the Kemper so much more versatile IMO.
And oh yeah the Gemini 2 is loud. Very loud.
I'm not familiar with Blueamp.
Good luck with your decision. Hopefully some of this rambling is useful for you.
Trey