Simply put, this is one of the few brand new mowers I would be willing to buy. There are hardly any mowers left that use cast aluminum decks. They're stiffer, absorb vibration, and last longer. And this one's 1/4" thick so it can take lots of punishment. The 3-speed transmission system is very simple and effective and it will last a long time. The wheels are also very heavy-duty and the rubber tires absorb the bumps MUCH better than the cheap wheels. Of course, the Kawasaki is a serious engine built for serious work. It has TONS of power and it's about the only current engine I can think of with an oil pump and filter. The Recycler II deck is very good for mulching, but you need the hi-vac blade to get decent bagging performance (Toro p/n 62-7700).
I can't remember what my local dealer wants but I think they were around $1100 or $1200. But with inflation that's not much more than a premium homeowner mower cost new in the '90s. And that makes sense, because they had the same good features the Proline still has. You'll only cry one - you can count on that thing lasting 20+ years!