Lets see,
1. Yes mine came with front and rear wipers, and washer tanks. Also comes with front and rear work lights on the top of cab.
2. The cab heat works great. Once it's up to full engine temp, you won't be able to keep your coat on. I normally push snow in just a long sleeve shirt, no gloves, normal jeans, and my snow boots. You may even have to turn the heater fan down to stop from sweating. The cab seals very well against the wind. I don't have any drafts or air leaks in mine, so pushing snow in 40 mph winds when it's -40 F outside, and I'm just comfortable and sitting there pushing snow.
3. The radio is ok, but not great. Funny you mention radio, my left channel speaker has been out since I got my tractor, I've just not said anything to my dealer about it. Maybe next service I'll have them look at it (warranty of course). With only one speaker, and the AC or heater fan blowing at max air, I can still hear it. It's obviously not a premium Bose system or anything, but last year, mowing pastures, had the AC on, the cruise control on, and playing music on the radio was very relaxing.