Welcome to the forum! Nice tractor and flail mower.New-ish tractor owner here (approaching 1 year). After much research, I got a Del Morino Centurian 158 (not the 'super') with hydraulic offset and hammer blades. It is quick hitch compatible. The hydraulic offset isn't much of an offset, about 11 inches, but works very very well for grass, brush, small saplings, etc. I love it!
The only reason (besides cost) I didn't get a "super" series like the one posted above, is I have an LX4020, and it would have been too much offset weight for my tractor.
This year I'm going to test the Del Morino Centurion Super 158 with the QH10 to see if it interferes with the PTO shaft. The literature says that it's not QH compatible, but I see that Speeco QH owners modify they're QHs to run standard rotary cutters but I've never had to do that with a QH10 or QH15 so perhaps it'll work.