Here are a few of the things that I know contribute to the "quality of cut" but in what order of importance would you place them? 1. Blade tip speeed 2. Horse power of the motor ( more about speed when under load I suppose) 3. Shape and depth of the deck 4. Sharpness of the blades 5. Wheel base to deck size ratio? 6. Type of grass 7. Type of terrain ( bumpy, hills, flat ) 8. Time of year? 9. Who's operating the mower ( experience level ) 10. Type of blades 11. Cleaness of deck ( clumping / grass build up ) 12. Type of baffles ( related to shape of deck, sort of ) Any thing else I am missing or you can contibute?