4wd is nice and would help out "some", but how much is debatable.
Those good old BH's arent anything at all like hanging a small BH off a CUT. They are WAY more massive, and WAY heavier. The FEL is pleanty usefull even on a 2wd BH compaired to a CUT BH in 2wd only.
Example: My buddy and I were building a dirt jump in the middle of the field. Hard packed clay/sod.
I have a smaller
L3400 CUT. 1/3yd bucket w/8 teeth. In 4wd and a 700lb blade on + loaded Ags, It was a struggle to get a full bucket. Doable, but had to work at it.
We also had the 4500 BH there as well. 10k machine. 1 yd bucket, 2wd, NO teeth, and 70% tread R4's. No trouble at all filling the FULL bucket.
It really suprised me how well it dug. Because before the 4500, we had an older JD2040 w/loader, and it was about worthless with anything less than 1000lbs on the back.
Point of all this is, I have my doubts how usefull 4wd would be unless you plan on working in really muddy situations with the FEL. Because even if the 4500 had 4wd in my example, it would have not been needed. Infact, I dont think I could even get the wheels to spin. It just powered though everything.
Plus, most people who buy a BH, plan on using it mainly for the BH. And 4wd does nothing to help the hoe out when you are digging with it.
If it were me, instead of looking at 3k more for a comparable 4x4, I would compair dollar for dollar. See how much nicer/newer/bigger of a 2wd you can get with that extra 3k vs spending the 3k on 4wd.:2cents: