Here is my dilemma. I have a 8" Dayton 3/4 hp grinder that I've been using for a while now with no issues. Today I came across this 7" Mac/Baldor 1/2 hp for $100. This thing appears to be built nicer than the Dayton (Heavy casting as opposed to the aluminum on the Dayton). They both run really smooth and run strong. I'm tempted to keep the Mac one and let the Dayton go to a buddy of mine who has nothing as of now. I use my grinders wire wheel more than anything. Would it be noticeable to go down to the 7" wheel and less power?