I'm looking for the best shop air hammer on the market. I currently have a $100 IR don't know the model off hand but it sucks. About all it does is make noise and vibrates my work and when start up you have to beat chisel point against work or it blows air out the front. I need one that has a variable feathered trigger. Most often used for removing bearings off shafts. Price is not really the issue, I just want one that hammers hard and not just vibrates.