I honestly think razor sharp seems to be the best. No matter the degree of less tan sharp, it always leaves a partially torn edge. I used a grinder on my push mower years ago, totally unbalanced but, it made the nicest cut and the appearance from the street was a deep emerald green. No white or light brown haze to it. I have been told that a super razor shard edge with dull, thats fine, I have a mower shop up the street to apply that razor edge once a month for 12$. I have a air gun to remove the blades in seconds, again no problem. I also have a totally hand surfaced, and truly flat, front yard with NO objects rocks ect. to hit the blade. I appreciate the advise but I think im going with the razor sharp edge. The gators leave a worse whitish light brown tear to the blades than the standard hi lift blades. I think I will keep the gators for leaves, but wont that generate unnecessary thatch which will smother or kill off my fall over seeding or my thickly established grass. I am realizing that mulching or side discharge, regardless of which type of blades is used to cut, applies nitrogen back to the grass which is self fertilizing, but how fast does the grass break down. Is it a problem to cut all season and NOT bag the clippings. I am fearful of the thatch come planting time which is every spring and fall. Can I apply synthetic granular fertilizer to new grass just 2 or 3 weeks old. I am really in need to green up my lawn and JUST planted rye seed last night.