I have a Mule SX which also has a storage space ahead of the dashboard, but I've already decided not to use it because it's too much trouble to get into and because the little plastic latches look like they would break if you used them very often.
Since I'm not going to use the storage space, not really an issue, but probably will remove the windshield in the summer anyway, when wind chill is not a factor. I bought the Super ATV windshield from Amazon, which is polycarbonate.
I think the glass windshield from Kawasaki for this model is around $900 (but it does allow you to access the storage space).