Hi,
I've got a Kubota LA402 loader with 60" bucket on my B2910 and a Woods 7500 subframe mount backhoe on the tractor.
The Woods loaders, quality wise, are probably fine. My Kubota dealer is also a Woods dealer and he recommended the Kubota loader and Woods backhoe. (The Woods backhoe was a sub-frame mount, and since I wasn't using a mid-mount mower, he felt the sub-frame mount was better.) Like "Henro" said, buying from the same mfg. helps to eliminate finger pointing, in case of a problem. Of course, they can still always point the finger at you! Anyway, I felt a bit more secure buying the whole package from the same dealer and it was HIS recommended package.
Remember that the higher the loader lifts, the more unstable the tractor may become. I think O.E.M.'s sometimes use lower limits to build in a larger safety margin. Probably not a big deal if you're careful, but something to be aware of.
One other thing, when I bought my tractor, I used Kubota Credit to finance. I was able to finance even with the Woods hoe. When I asked the dealer about that, he said that as long as XX% (I forgot the number, think it was 70-80) of the total purchase is Kubota equipment, they will finance the deal. It's possible that in my case, a Woods loader and BH would have exceeded this limit. (I guess I could've always bought those separately, but I didn't wish to commit that much cash at the time.)
One good thing, Woods will paint their loaders, backhoes and snowblowers in the standard O.E.M. colors, including Kubota orange.
The Woods loader might also be more readily adaptable to a "quick-attach" buckey mount, which could also be a plus for future use.
O.K., I've babbled long enough.
Good Luck,
~Rick