I have contemplated purchasing a Chipper/Shredder for a couple of years. I originally thought the DR was the way to go, but after much thought, I decided I needed a chipper/shredder versus a DR chipper. I have researched the MacKissic, Bearcat, and DEK chipper/shredders. Iam willing to pay approx. $2500 for a reputable unit. I prefer a PTO model to use with my John-Deere 670 tractor (18 HP). Unfolrtunately I haven't found any comparisons of the above units. Any assistance appreciated.