I have looked at and done a little research on this same mower (the 52", 20hp version). I can't say anything from personal experience, but I got input from several (well, actually 4) mechanics who told me there was no way they would pay extra for the Honda. In fact, two of them told me they would pay extra for the Kohler! I was surprised, but to a man they said the best engines in this size range and application, were: 1) Kawasaki; 2) Kohler; 3) B&S Vanguard; 4) Honda. They said that Honda has built up a great reputation from engines that were very well built in the past, but that the engineering on their newer enigines was inferior to the others, Kawasaki and Kohler in particular.
Take this for what it is worth...