I can help here..

The 11R is fantastic! But it cannot keep up the Axe 2. As far as the Standard and Ultra goes, I spent half a day with a guy that has gigged with an Ultra since it came out, an absolute genius with it, and it does not hold a fart in a bag compared to the Axe 2..NO ONE that has SPENT TIME with BOTH will ever tell you anything different. I would love to figure out how to get a Kemper too, but I do not see that happening..I would however love to have another 11R, as I am most familiar with it and it has some GREAT tones!