I would lean towards the heavier bullets from your choices. Make your selection planning for the worst shot, not the best. Just me, but I want an exit wound and to minimize "explosive" bullet expansion that can lead to lots of blood shot meat if you end up with less than ideal shot placement. I want every ounce of that delicious flesh. Opinions vary, just mine.
Shot placement is the same. Although a lot of the bucks may be a bit bigger than the local whitetail, they don't seem to be particularly hard to knock down.
We eat the whole thing, from backstrap all the way down to the shanks (osso bucco). My wife can make a crowd fight over a savory pot of venison ankles.
Hard winter for exotics in Texas. Heavy snow in December and then the big freeze later. A couple of landowners and outfitters told me a complete loss of all yearlings and major losses of adults in pastures without heavy cover and supplemental feed. Photos were heartbreaking, stacked like cordwood on trucks and trailers. Unfortunately, appeared to have minimal affect on Californians.
Good luck and let us know. Pics or it didn't happen!