Yours is a common progression - pretty much the same as I did. Started with the
BX23, 6" groud clearance scared me off, then looked at the
B7510/7610. Then I wondered why they were so light, and looked at the CK20HST and liked it a lot more. Then I bought an LK3054, but that's another story! /forums/images/graemlins/smile.gif If you're not mowing, weight is your friend, and a subframe-mounted BH is a definite advantage.
Also, the "quarter-inching" valve, or whatever they call it now, is marketing hype disguising an inferior lift control - you want the absolute height control like the CK20 has, and like Kubota puts on their higher priced units.
After I looked at the Kioti, I would have bought it at the same price, even though it was cheaper. Grab ahold of that handle on the fender of the
B7510 and give it a good pull, then do it on the CK20.