Just got a 6 foot, have run a 4 and 5 foot behind it (4344 hst, so 38 hp on the pto)
We have broke 2 shear bolts the first day; the 6 footer is heavy to get going. I am looking into a slip clutch; the shear bolts are hard to change alone. Search for slip clutches on the fourm, you will learn how to maintain them
it cuts well enough but if you have thick grass you will feel it. If I has to run on hog, it would be a 5 footer, running 2 I'll keep my 4 and 6.