Emrys wrote:I have a home studio with Logic Pro, Motu 828es Audio Interface, with sounds from Omnisphere, Komplete 12 Ultimate, East West Soundcloud.
I have a Komplete 61 key keyboard.
How can I justify buying a Kronos?
Help me out!

OK, so what does the Kronos buy you that you don't have today... Here's one "take". Surely not a comprehensive list but these are some things that got me to the buy button and have kept me satisfied after 2 years of ownership.
First, you get a hardware-like experience. You can leave the PC turned off if you want to and not care who tagged you on Facebook or that Acrobat Reader needs an update. No disruptions; just you and a dedicated music making machine. Of course you can still turn the computer on any time you want, and take advantage of that whole world of stuff. But more and more, I find it refreshing to leave it off sometimes. Another thing I find refreshing is that everything is ready to go once it boots. People complain that it takes ~2 min to boot. But I'd rather pay that cost one time up front while I go get a beverage. As opposed to when I switch from preset A to B, the machine has to spend time unloading synth A, loading synth B, loading synth B's samples. Once the Kronos has booted it's all pretty much instant to switch between sounds, no matter what synth engine(s) the preset is from.
Everything is hardware controlled automatically. If there's not a dedicated or assignable controller already mapped to what you want to control, it's as simple as touching it and then you can control it with a slider, encoder, INC/DEC buttons, or key in a value. No mouse. (What's less musical than a mouse?) The Kronos is a cohesive, single manufacturer, and extremely deep musical instrument - all the many pieces are built to work together seamlessly.
You'll get a lot of creative tools. KARMA, RPPR, MIDI step recording, creative routing, integrated chord pads, to name a few. You'll get nine (in my opinion) world class synth engines that cover the major synthesis types. And a comprehensive multi-sampling and re-sampling system. Pretty much any effect you could ever want.
You'll get a couple thousand presets to start working with. One thing that impressed me is how deep many of them are. It's not just 'check out this sound for a sec and move to the next one'. You'll want to mess with all of the hardware controls that have been assigned to them (e.g. vector joystick, X/Y joystick, RT knobs, etc.). You'll find worlds of variation in some of them in addition to performance controls, without having to do what I'd call synth programming. There are quite a few sound packs from Korg and 3rd parties if you ever need more.
Assuming you get a model with the RH3 keybed, you'll have a really nice keyboard (in my subjective opinion) that feels great for piano, but that also lets you move fast enough to play synth and organ parts.
What everyone says about the learning curve is true. But you don't have to master everything right away. You'll turn it on and be delighted by it pretty much immediately. Watch the video manual from Korg and you'll feel reasonably competent. But it is so very deep - the manual is like 2,000 pages. To truly master it will take some time. There's a lifetime worth of exploration in this board. As for me, I'm enjoying the journey. The manual usually tells me what I need to know. In the rare cases it doesn't, there are some generous and very knowledgeable people here on korgforums who have helped me out.
Maybe something in there is a small push for you.