I have owned the Husqvarna 7021RB (self-propelled) since January 2012. Over those 8 years, it's been used as a trim mower to mow where my 2006 Snapper rear engine rider can't get. I've had to replace the drive lever a couple of times and the in-place cover over the side-discharge once as well as routine items like blades, air filters, plugs, and oil changes. Btw, the gator-type blades improve mulching.
For the past 15 years, I prefer buying Honda engines in different branded mowers, and not buying a dedicated Honda mower. I was looking at the Toro Super Recycler to replace the 7021RB until learning that it doesn't have wheel bearings on all four wheels. My Husqvarna does which helps in turning and maneuvering.