Everyone has a different opinion, Walker's have one of, if not the best cuts and they are designed to pick up clippings and leaves. A few other mowers with vacuum baggers can be very close to the quality and the cheaper cost draw most towards "regular" zero turns instead of spending the money on the Walkers.
There is an Old Blue Chair for each and every one of us, we just have to find it.
2006 GMC Sierra 2500hd crew cab
BOSS 8'2" Power V
Hustler X-one 60"
Toro Proline 36" wb w/t-bar controls
JS46 22" walk-behind (wouldn't recommend)
Shindaiwa T254, Echo trimmers, chainsaws, pole hedge trimmer, pole saw, hedge trimmer
Shindaiwa 633 and Husqvarna 130BT blower