To my way of thinking, any tractor mounted hoe is designed for maintenance digging, or the occasional stump or burial hole.. serious digging on a regular basis calls for a regular back-hoe or excavator.
I remember Kcender commenting once he'd have been further ahead to buy a good used backhoe considering the amount of work he did with the 3240. Bottom line, they're not meant for heavy use, they meaning the tractor/hoe combination. Any add-on hoe will toss a tractor around like a dog with a rat if it's used hard, especially in rocky ground.
I've been impressed with the Woods 'hoe offerings, if the day comes when I can justify buying one that'll probably be my choice.
My further 2 cents :}
Sean