Bush Hog makes a model 1846Q (or something like that) that is touted as fitting most all tractors in the 12 to 25 Hp range. I had one on a Ford 1700 and was generally pleased with it. Can't remember the price, because it came with the tractor, but I think it was under $2500. One consideration might be compatibility with a MMM if you have one. A lot of tractor dealers offer them as after-market add-ons, and you can visit Bush Hog's website for information. www.bushhog.com
Kubota B8200, then a Kubota L3130 HST, now a Kubota L3400 HST
My B8200 came used with a Bush Hog loader, (1840 Q?) and I second Casimir's opinion... I had to modify mine in order to mount the optional Kubota power steering kit I just found, which makes a lot of difference in how user-friendly the tractor is when you have a load in the loader, so I "handled" the loader frame components a bit more than I might have otherwise. It isn't so nicely made as, say, the Kubota FEL's, but then the price is nice. It works fine, and they seem to hold up. The paint coverage sucks, but it's a tractor, right?