Jameswd,
I too have been debating the supersteer question, but after test driving a regular turn TC40DA yesterday I realized it turns pretty tight as it is, so I decided to drop that option and with the 1,000 dollars in savings get the soft cab and heater for $1300 which I'll install myself. They didn't have any supersteers on the lot, but I'm also wondering if your plan is to pull a mower, wouldn't the tight turn jack knife the mower? Just a thought.
BYax