Between the Recon Scout and the SOG you're talking about two knives about as different from each other as could be. Front heavy versus neutral balance, full flat grind versus dual saber, carbon steel versus stainless. What are you wanting to do with it? I know you said survival but that's a bit broad, as both killing sentries and building a lean-to could fall under this heading.
The SOG is patterned heavily on the old SOG Bowie which is first and foremost a fighting knife. The dual saber grind is really good at entering ribs without getting the edge stuck in them, and looks damned cool, but is extremely limited as a general task cutting tool. The Team Elite will cut slightly better than the bowie simply because it's a thinner blade stock and so the hollow grinds aren't so deep, but the geometry is still focused on stabbing rather than cutting, regardless of how sharp it is. Can it be used for utility purposes? Of course, but several others will run miles around it.
The Recon Scout is the more utilitarian of the two with its full height flat grind. I find that the factory edge bevel is adequate at best, but with a little thinning it can be turned into a very capable slicing, splitting, chopping blade. It's a heavy knife, balanced towards the front and this helps with chopping but gets somewhat tiresome if you're trying to be really precise with it. Definitely would recommend having a pocketknife around to handle the latter and let the big bruiser do big bruiser stuff.
The Gerber LMF II is decent enough but very different from the knives you're describing from a size standpoint. And no, marketing aside, there's nothing about its serrations that are any more capable of shearing through steel than any other serrated knife. Especially when you only have about 2" worth of teeth to work with.
I also highly recommend the
RAT offerings. They're all about solid performance through excellent blade geometry and function rather than armchair commando cool factor. The RC6 is the largest they currently produce. You can also go the Ontario RAT route (RAT knives was once partnered with Ontario, though they've gone their separate ways). Ontario still has the RAT 7, which will have a little bit of a chopping advantage over the smaller RC 6, while still being a carry-able size. The Ontario RATs aren't built to the same fit and finish as the genuine RATs, but they're very solid working tools.
The
Becker BK7 from Kabar is also an excellent choice in the size you're looking at. Yes, it is a saber grind, but it's a saber flat versus a saber hollow, and that coupled with the width of the blade makes for a cutting geometry that is still very utilitarian.
TOPS knives are of a very consistent quality and workmanship but are (and this is a long-discussed topic on these forums) kind of pricey for the range you've listed, and also tend strongly towards looking cool first and being useful second. Lots of fat saber grinds with swoopy curves, saw teeth and the like. They have a few patterns which are pretty performance oriented (with the sheer number of designs they have I think it was inevitable that a few sneak through) but unless one just absolutely drives you wild in a gotta-have-it kind of way, I don't see the reason to pay the TOPS price when RAT and Becker are out there.
Best of luck and be sure to tell us what you decide.
I'm prett torn between the Spyderco woodlander and the RAT 6, I think I'm gonna go with the RAT 6.