Well, as the op, I decided to go with the X590. Although, it is not 4WS, which is what I was leaning towards (previously owned a X324), I liked the fact that I did not have to spend an extra $4k to get an X700 series so that I could till a garden. I was so impressed with the additional speed of the X590 over the X324 and going from 48" cut to 54" cut, that not having the 4WS seemed irrelevant. The X590 can mow in a tight enough radius around nearly everything I have without having to revisit it a second time. If that was not enough to convince me to get the X590, my son (who is studying mechanical engineering) convinced me to get the X590 over the X584, since it also had EFI.
So today was my first time mowing with the X590. Oddly enough, for all the years I've known the neighbor this was the first time that he came over to stop me and ask for my help. His zero turn with turf tires partially slid down a ravine. That sort of made me happy I had the HDAP tires as we both live next to a ravine.
So, in summary, although I wanted to stay with 4WS at either the X500 series or X700 series level, other factors played into my decision to get the X590.
- Roughly $4000 cheaper than an X700
- Can still acquire a rear tiller for an X590 that you can not with an X584
- HDAP tires standard on X590
- EFI on X590 that is not available with an X584
BTW, I was extremely impressed with the Accel mower deck. I hardly noticed any clippings. The X324 that I just got rid of (year 2007), always left behind huge clusters of clippings unless I stayed on top of the mowing every 4 days.
Regarding a tiller, there is a 42" hydralic tiller available for the X590, but it costs nearly $2000, so that will have to wait. I will most likely get a snow blower as well (live in northern Ohio), but for now I have an atv with a plow to handle that.