Our old Gravely 30 inch mower did a pretty good mulching job. That's all I ever do with leaves: mulch them with a good mulching mower. Don't collect them. Mother Nature meant for them to be there. Just chop them up so they don't smother your grass and leave them there. I used a Scag mower to mow 4-5 acres of church property in NJ with gobs of big oak trees on the property. It wasn't a mulching mower. So, I'd drive around, discharging the lawn and leaves to where I was going the next round. Kept doing this until the thing would hardly run. Then turned around the other way for one round. Beat using the old Sears underbelly mowers with an engine attached to their discharge to blow the leaves into a huge tented wagon behind. That rig was a mess to use and to maintain.
Today, I used our Honda walkbehind on our trails to chop up the leaves. It's a great mulcher: twin blades.
Ralph