Another consideration(aside from mulching with a rider/ZTR) is that "the leaves have to go somewhere":0)
(1)Leaf blowers-Simply "moves" the leaves from Point A(driveway/sidewalk, yard, etc.) to Point B(your yard, ditch, neighbor's yard, etc.:0)
(2)Leaf Vac/Shredder-Removes the leaves, but eventually a place must be determined to dispose of said collected leaves(bag em for garbage pickup, etc.). And this must be done quite frequently when the bag gets full:0(
(3)Sweeper-I had one of these that I pulled behind my lawn tractor(versus the manually push type in lmf's link) and believe me emptying those things are a real hassle....also, a hand-pushed requires double work if you are still mowing(sweep all leaves, then go back and mow). Also....again, the contents of the sweeper has gotta go somewhere:0(