Sportzkat,
To me, that price is high. I bought a P260z last year for about 200 less than that. I do believe I got an exceptional deal though. As the other posters have said, the 60" is only a bit more pricey and would cut faster. I also think it is the most popular size in that machine for resale purposes. I have always liked Gravely products, and think they still make an excellent ZTR machine. My only complaint with the 60" machine is that with a heavy fixed deck, it would not follow ground contour well and would ridge the lawn if the terrain were not butter smooth. It did cut well (and fast) on smooth terrain. This would perhaps be BETTER with the 52" size.
John M