GET THE WINCH. don't let the animals decide what you want on your 4x4. once mounted burn a small weld bead where the nut and bolt threads exit. the mount will have to be cut off when you change it to another vehicle (like,in 10 years) but thats the point, so will the animals. Also-two spares are good, carry irons and patch/plug kits for serious tire repair. You need a good compressor, I carry a "truck air" model i found at K-mart, its great.
you're in NYC so a gun rack is out of the question.haha...(sorry). for your expensive stuff consider mounting, i.e. bolted to the floor, an ammo box-cleaned,painted, lined with fun fur-whatever, under the seat or in back to stash your GPS etc...
a high lift jack is very handy and has many uses, its also dangerous so learn how to use it.