The only knives you mentioned that I own are the Military, Police (G-10 handle), and Benchmade AFCK Axis lock (D-2 steel)
In my opinion, the Al Mar is just as good (if not better) than any of these in terms of getting the most bang for the buck.
The Military and my Police models both have great full-flat ground blades that are wickedly sharp and have SUPERB edge geometry. The SERE 2000 doesn't have a flat ground edge, but the edge geometry is still EXCELLENT and the blade seems sturdier (especially in the tip) for very hard use over the two Spydercos. In my opinion the Military and Police have slightly better edge geometry than the SERE 2000, and lastly the AFCK when comparing those four for edge geometry, although I haven't fairly tested each knife agaist one another on certain cutting chores, so that is speculation on my part. I like the VG-10 better than the CPM 440V (Military) ATS 55 (Police) AND the D2 (AFCK) The D-2 is a bit harder for me to sharpen, although it holds a great edge, and the VG-10 seems to hold an edge better than the other two. The VG-10 should be more stainless than the D2 although I haven't had any of the knives rust yet, as I tend to care for them, try not to swim with any of them, and it's really dry where I live.
As far as pocket carry goes, the SERE 2000 would be my last choice for daily pocket carry, simply because it's hard to draw because it rides so low. I carry mine in a large Benchmade pouch and the knife fits the pouch better than any of the other three knives. The only time I'd prefer to carry the SERE 2000 in the pocket over the other three is on duty (as a police officer). When in uniform, my holster rides right above my right front pocket and most knives (especially the Police because the handle cants forward a bit and rides high in the pocket) can be hard for my fingers to grab because the holster gets in the way. It is also hard for me to get my hand in my pocket because it just doesn't fit between the handle of the knife and the holter very well. The Military has the same problem although to a lesser degree, and the AFCK is even less of a problem because the handle cants the other way and my hand slips right past it due to the curve. The SERE 2000 rides so low that I hardly even notice it when carrying it on duty but it can be hard to draw because it rides so low, and I need to carry something that I can draw more reliably. This part of the comparison is probably specific to me, but I think it fits the general carryabiliy aspect of the knives, so I hope you find it useful.
The SERE 2000 is about twice or at least 30% heavier than the other three knives (estimating from memory anyway) and the handle is considerably thicker than the Military (which doesn't have any liners along the handle except the half of the liner lock) and the Police I believe only has one liner, wich is thin. The AFCK is almost as thick as the SERE 2000 because it has double liners. (I'm guessing, I don't have the two with me right now to compare so I'm going off of memory)
Really the only negative thing I can say about the SERE 2000 that I have found is that it rides too low, but I have overcome that by carrying it in the pouch, and it might bother you, so be aware of it.
In my opinion, any of these four knives would be a great buy and are worth the money. I don't own the steel-handled Police model though and the G-10 one like I have, I believe is discontinued which is unfortunate, because the edge geometry is SUPERB, and the knife is strong but light. If I had to buy another one of the four, I'd buy a second SERE 2000 over the other three, and the runner up would go to the Axis lock AFCK.
Hope this helps.