If I were you I'd probably go with a honda 21" commercial mower. I work with some guys who have a side business and this is what they use and it works great for them (and my dad has one of the hrx non-commercial ones and he loves it). I've used them both pretty often with much satisfaction. Their self-propelled mechanism isn't anything to sneeze at, you have to walk at a nice little clip in top gear. Plus, they're much lighter than the 36" you're thinking about. Even though the 36" has 0 degree turning radius it's still a big mower on neighborhood lawns (unless these are large neighborhood estate-type lawns you're talking about). But, if you're still set on a 36", Toro has good products, give them a looksy too.

__________________
1984 300D, 228k, Light Ivory, Java MB-Tex