I'm looking for a new blade for a mower that I use to mow my residence in eastern Pennsylvania. The blade hasn't been replaced in years so I figured instead of just having it sharpened maybe its time for a replacement. The mower is a Toro Super Recycler Model #20461 that is probably close to ten years old or so. I use the mower solely on the mulch setting so to the extent there is a blade that is better for mulching that would be preferred. I never use it to bag or side discharge so I'm not concerned about an all-around blade. Any recommendations would be appreciated. Thanks.