The X500 is a good machine. I just prefer the one that is the easiest to replace parts on and easiest to get the deck off because I like to work on my own stuff.
For instance, the transmission drive belt is easier to replace on the 325.
The deck belts are routed better and tend to last longer.
The PTO clutch on a 325 will usually last longer than the X500.
I have replaced lots of steering gears on the X500's, but on the 325 only a balljoint once in a while, which is alot easier to replace.
It all comes down to a matter of preference.
The 325 is an older machine compared to the X500.
Just passing on some info that I have learned over the years working on both of these machine here at the shop.
In the end, buy what suits your needs the best.
Hope this helps!
