I would not recommend D-2 for large knives. It does hold its edge well outside of chopping, but even with a thicker 0.030" edge ground to a semi-convex "rounded" finish, D-2 eventually chipped quite unpredictably while chopping with a light 17 ounces knife: I mean by that that it survived some hard work and then chipped easily on soft rotten logs...
This could be due to the core of rotten logs being harder, but the ease with which it chipped led (for me) to a loss of confidence, despite the good edge holding outside of chopping: I hate to say it, but when you get
far greater ease of sharpening, and even better edge holding, while chopping (at thinner angles) with cheap Chinese -or Taiwanese- 420J, all this with no chipping at all in thousands of hits, you tend to be less awed with D-2...
The lower knife in 5160 looks like it did even worse than the D-2 Lile, but in reality it was a 0.020" edge at barely 12 dps, so
much thinner than the Lile above with a 0.030" edge at 15 dps. (at 11.25" and 22 ounces, it also hits much harder and deeper)
The 5160 later got a micro-bevel of around 17 dps (about where the Lile started from), and all the chipping/warping issues instantly went away: This is how it later did against a slightly thicker -overall- convexed Battlesaw (15 dps final) in INFI:
I would recommend, in order of preference: 420J, then 440A (or Aus-6), and, if you must have Carbon: 5160. 440C is not bad, but very hard to sharpen "neatly", plus there is a lot of bad 440 out there... For sharpening in the field, even with good coarse diamond hones, 440C will result in less even edges with hard to remove wire edges. If you don't plan to sharpen in the field, good 440C will hold an edge only slightly longer than 420J, but is otherwise just too hard to sharpen to be practical, especially for the small difference in edge holding.
One exception to that would be using 420J left outside for hours in -30 Celsius weather: For some reason its edge-holding ability (due to the wood being frozen harder?) goes out the window in extreme cold, while INFI or CPM-3V stayed roughly the same(?). It was a one off experiment, but noteworthy.
Gaston