That's a pretty big tractor... I was looking for a BH for a MF1455, which is about that size too. I wanted a good size hoe, like 8' dig depth or better. IMO, if you want to buy new,
Woodmaxx is probably the best deal, assuming you'll need some decent digging forces. (The Titan hoe is a bargain if you're only digging in soft ground...)
Woodmaxx carries replacement parts, they spec quality hydraulic control valves, and they stand behind their products, from what I've gathered...
FWIW, I've moved on in a different direction... I am keeping an eye out for a Bradco 509. Most of them are set up for use on a Skid Steer, but they can be converted to 3PH or subframe mount with parts available from Bradco. (Subframes not avail for all tractors...) They kick the snot out of any china hoe, and even the Ansung BH's which are really nice and powerful. And you can find them in decent condition used for less than almost any of the china hoes new. (I just missed one for $3000...) They are very heavy built, and hence very heavy comparatively, but that should be find with your tractor. They were also sold for a few years as the Edge 509. There is a 511 too, but I think it's fairly large for even a larger CUT like ours...
Good luck!!
Must my $0.02.