I just picked up a 72" grapple for my m7040. I purchased it from Carolina Attachments...just a few miles south of Greensboro, NC. I live in VA...about 3 hours away...not too bad a ride! I opted for the "Heavy Duty" model...but think I would have been satisfied with the "Standard Duty". They also have an "Extreme Duty" model.
We live on a farm and cut lots of firewood...we have to support three houses. When I purchased the tractor, 5 years ago, I spec'd it out with a WR Long 4N1 bucket...which has been great. I have to agree with the other replies...the grapple is the way to go for brush and wood cutting.
It would take a lot for me to tear something up on the grapple I purchased...it seems to be rated for commercial duty. I know some of the folks have mentioned pricing. This model from CA will run around $2,100.00.
Hope this helps!