Im going to have to go with the kubota like said above. Compared to the BC and TK, it is much smoother and pushes way harder. I did alot of final grading work on your typical residential yards which came out immaculate, and LOTS of lot grading after demos, and the svl90 will push nearly an entire pile of river sand without hesitation. I was down to about 10 minutes per lot that we graded compared to 25-35 with the TK and 45+ with the BC.
I must admit, when I was told that we were getting a kubota I was super pi$$ed, I thought they were junk compared to the TK tl250 we had. I ate crow big time on that one...
The BC 870 we demo'd was super ncie, and very strong, but I didnt get enough time in the seat to actually test it out.