I've had a Surge since it became available. I've used it at work, and the spring for the large bit holder has come out twice. Also, overall, it doesn't seem to be as precision-made as my Charge XTi. There seems to be more "slop" in the construction. I was surprised by all of this, because everything else I've had from LM has been A+ all around. It's also bigger and heavier than necessary (although, with you being a hunter, you may want the bigger tool). I recently decided that I'm going to sell the Surge, and I've bought another Charge XTi (the one I already had was a gift, so I don't use it at work). I've used quite a few multi-tools and SAKs in my day, and I must say, the Charge is really outstanding. Just fantastic. I got my second on eBay for $65. Also, the straight blade is 154 CM steel, which is better than the steel on either the Core or Surge. I would strongly recommend a Charge, unless you absolutely need the larger size of the Core or Surge for some reason.
Edit: One nice thing about the Surge, though, is the blade exchanger. I've never done this, but I imagine that you could use the removable file (one side is diamond) to sharpen the straight blade. Of course if you want to have the saw handy as well, that means you're going to be carrying a blade around. Fortunately LM includes a small pouch that will hold two blades, and it fits in the pouch. This might be a desirable feature for big outdoors types.