Couple of comments from me:
Personally for bedroom playing, better to tune the sound to a consistent output, e.g. studio monitors or whatever. I don;t think a cab will give you much else at lower volumes in my opinion.
This is going to sound nuts but...also consider this is a top piece of kit, massive rungs above the Katana...if you are not using it for recording much or gigging then perhaps a HX stomp might be good enough. Not trying to talk you out of it as I think the Kemper has the best sounds but...I would definitely consider whether you need the remote? To me its a gig tool primarily or if you are doing a lot of switching in a recording session... Perhaps consider the stage...
I'm saying this so you can save the pennies and get another guitar
...and welcome to the gang!
Thanks V8 Really appreciate your good honest answer,I really value everyone's opinion on here, I can see you really do all know what you're talking about.
The last thing I want to do is make an investment of this size for it to be completely opposite to what I thought it was. This I guess is partially what causes people to just give up.