Hi,
I should be outside right now working my tractor! Came in for a break...
There is a chance I can give you an unbiased opinion to some degree, as I have a B2910 with backhoe, and just this morning took delivery of a BX2200.
The 2200 is the same size as the bx22. I am sure it is a fine machine, the bx22. But this BX2200 is in a different class from my b2910. Just like the b2910 is not in the class of other tractors.
The b series Kubota backhoes are all 3ph mount as far as I know. They are a bit of a pain at first, but not that hard at all to take off and put on if you learn the right way to begin with. I learned from a post here about a year ago.
While I wish the backhoe went on and off as easy as the loader, it still in not that big of a chore to put it on and off.
Like anything else, you won't miss what you never had.
I would not be happy with a bx22 after owning the b2910 with backhoe. If I had bought the bx22 in the beginning like I was going to...I would love it and it would do all I ask of it, because I would not ask it to do more than it could do.
Not sure if this makes sense...I say if you can afford it, go bigger.