What’s useful, what’s a waste of money?

I’m going to get either an Outlander XT 650 or 850. Really want the 850, but think it may be overkill for my usage (snow plowing flat gravel driveway, firewood gathering, trail riding and some woodsy riding, meaning stumps and brush).

I’ve seen skid plates mentioned as very useful, but should I go for full or just the front? Or?

The dealer says to get heated hand/throttle grips. Would’ve been useful on my motorcycle, but my feeling is it may be just another thing to malfunction. Opinions?

Would it be worth it to upgrade any other system, such as shocks, differential locks, or just wait until the oem stuff malfunctions? Of course, if it doesn’t malfunction, so much the better.

Anything else?
Thanks for any advice.