I've got a Ferris Industries ZTR IZ 1500 48" cut with a 21 hp Kawa vtwin. It will cost you 2x's as much but you'll get a helva good mower, they have different sizes if you need the 60" cut. I bought mine in 07 or 08, I do the maintanence on it myself, no problems at all, only thing that broke was the engine meter and they gave me a new one to plug in when the original one stopped working. ZTR's will reduce your mowing time and you'll never have to buy another mower, as this is truly a commercial grade mower, built to be used 8 hrs/day all week long with minimal down time.
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.