Real world experiences for those of you who own / work for a living driving ZTR mowers

I've set a budget of approximately $4,500.

And based upon these, I'm considering:

Hustler Raptor # 42" - 937847
Gravely ZT-XL 42" - 915206
Scag Liberty Z 36"

The Hustler is approximately $2,799.00 and can be purchased at all places, Lowe's and serviced elsewhere at a local mower shop that is convenient to me. And if purchased at Lowe's, I could obtain a mover's coupon that would allow another 10 % off the sales price.

The Gravely is $4,374. It is sold at a local hardware dealer that is convenient to me and can be serviced there as well.

The Scag is $3,999. It is sold at a local lawnmower shop that is convenient to me and can be serviced there as well.

All three would be used as a residential mower.
All three have Kawasaki engines.
All three have Hydro-Gear transmissions.
All three have welded decks.
The Gravely and Scag are foot deck operated. The Hustler is not.
All three have drive spindles.
The Hustler and Gravely are 42" cutting width. The Scag is 36 " cutting width.
Hustler comes with a 3 yr. warranty, no hours.
Gravely comes with a 3 yr. warranty, no hours and 5 yr. warranty on deck shell and frame.
Scag comes with a 5 yr. warranty or 750 hours.

Are there any other brands that I should consider? Spartan is out of my price range and is overkill for what I need. Same with Dixie Chopper.

Haven't done my best research on Bad Boy (read they had pulley issues) and ExMark (read their lower end line is junk whereas higher end is great, but out of my price range).

The 36" cutting width vs. 42" cutting width ranks lower on my priority list in terms of what separates these mowers. I'm looking for something that is going to be reliable, won't beat me up riding and can be serviced quickly with readily available parts.

Thoughts?