Buying Advice Walker Mowers

I had a demo with a new 14 hp Walker S model. It is a carburetor Subaru air cooled engine w/ splash oil system. It has the small 7 bu bin, a 12.5" fan and will take a 42" deck maximum. I have also found a 2008 model 31 hp with larger 9.5 bu bin, 52" deck (I would like a 48") with 1,800 hrs on it. The smaller new one is $8,000 and the used one is $6,500. I will be using it for personal use on about 1A of grass (level). I favor the used unit because I like the idea of wide width tires (less footprint) + being able to use a 48" deck.
I think the used 2008 model has a 10" fan. I would like your opinions on which might be the best way to go. Thanks, Frosty

Buying Advice Walker Mowers