I have been using a tree saw built by Hicks fabrication of Berrington Ks. for about 5 years. Quite a few sold around these parts but not advertised much out of this area. It was probably the most economical option for me at the time of purchase. Mine was purchased for around $3000. There have been steady improvements in the Hicks saw and I think it is now in $5000 range. I love this saw and will probably upgrade to the improved model later, but can't seem to wear this one out. So far it has been bullet proof. Mine has a 28" 5/8" thick blade with 12 pengo rock auger teeth. Makes a 1.125" kerf. It will cut a 12" tree in one pass and a 24" tree by working both sides. No matter what size equipment you have there is a tendency to "overload" or do more than designed for. That is my way of saying I have cut larger than 24" trees. This saw has a pusher plate on the front so trees can be moved out of the way easily. I use an 1845C skid steer with Hi flo hydraulics. Supposed to be 30GPM @ 2500 PSI. That calculates to 36 HP on the saw (+/-) This is not an attempt to say a saw is better than a shear as both have their place. Wish I could afford to own both. Shears are probably faster in larger trunks but in the 8 to 10" range I can have 2 to 3 more trees down while a shear is cycling. I would love to try this saw on some of the higher horse power machines. This saw will cut at or below ground level, but the more dirt involved the harder it pulls. The Pengo teeth hold up well. Have broken 2 or 3 and lost about the same amount in about 750 hrs of cutting. No major trees on the ROPS. Small stuff sometimes end up between the cab and the gaurd mainly becuse I haven't pushed them out of the way.