Right now I'm getting my blades sharpened at a repair shop but not nearly often enough. I want to buy a sharpener and looked at bench and angle grinders, but now I'm thinking I should get a professional sharpener. I only have 2 21" mowers and would sharpen twice a week. Is dropping $800.00 for a Magna-Matic and a balancer too much for my situation? I want to get the best sharpening possible. How do you Magna owners like your machines?