Hoes are in the range of $1000 per foot of digging depth. Cheaper hoes are less expensive.
Kubota, Woods, Bradco are three very good quality hoes. They will slot into that 1000/ft range.
Other hoes from Italy, S.Korea, China are going to cost less - but won't have the same fit/finish/quality nor the robustness to stand up to rugged constant use. You may not need that, so the choice is up to you and your uses.
Your 4330 could handle an 8 1/2 or 9' hoe pretty easily (full under frame). You may need to build a frame yourself if you don't go with the Name Brands.
jb