Howdy BillyYank! Welcome to Bladeforums.
Here's a couple of quick observations. Just my $0.02 tonight:
1. You may want to wait until you are in the military to see if the unit you are stationed with has any restrictions on the knife you may (or may not) carry. Some units have limits on blades. The Pilot Survival Knife you are looking at will *PROBABLY* be short enough to pass muster for size restrictions, but the unit regs will be the judge of that. Once you know the limitations imposed by your unit, you can then order a knife online that will meet the criteria.
2. As with researching any knife purchase, there are a few questions that can be asked to guide and limit the search:
- "How much money am I willing to spend?"
This will eliminate researching knives that are simply too expensive for current funds. As you noted, to a degree you do get what you pay for. However, careful searching can help maximize the amount of "bang for the buck" you get in your knife purchase and keep you from paying more than necessary for your blade of choice. Asking for opinions here on the forums is a good start.

Spending time online searching the web for info & prices will give you a decent feel for what is out there and how much to pay for it.
- "What are the jobs this knife absolutely has to do without failure or gross damage?"
This establishes the minimum level of performance the knife will have to provide. If a knife gives any indication whatsoever that it can't meet your minimum job list, it's taken out of consideration. What those minimum jobs are for you will depend on your own circumstances and comfort level. Some folks feel well-equipped with only a Swiss Army Knife for an extended hiking trip, while others prefer to carry several full-size fixed blades for a day hike. Different strokes for different folks, y'know.
- How much maintenance or sharpening while using it will this particular knife require?
This is to insure that your blade of choice is forgiving of your time, balanced against the performance capability of the blade. In spite of the amount of "hurry up and wait" that happens in the military, you may want a knife that both performs well & long and lives easily with minimal care & cleaning in grungy conditions in case you wind up in the field under harsh conditions. If absolute performance is your most important feature, non-stainless high-carbon steels may well be your choice. If remaining maintenance-free is more important to you, then stainless is the way to go. IMHO the stainless steels that seem to provide decent performance, sharpenability, and corrosion resistance these days are 440C (cheaper) and S30V (no so cheaper

). I would have included VG-10 but IME it sharpens less easily than 440C.
- How well does the handle fit my hand?
This is a huge consideration that all too often gets overlooked. The handle is the interface between the blade and the human user. A poorly fitting handle design (which is a VERY subjective & personal aspect of the knife) can make using even a very strong & sharp blade torture. OTOH a very comfortable handle will make you feel better about using a blade that may be less than optimal. I very strongly recommend that you go to a local cutlery store or knife show and handle knives from as many manufacturers and makers as you can (no matter what their price) just to find out which handle style feels the best to *YOUR* particular hand. Once you've found your favorite handle style, keep it in mind while shopping.
- How well-constructed is the sheath for my purposes?
This is another oft-overlooked aspect of a knife. The sheath is the other user-interface component of the system. Having a well-fitting, secure sheath for your knife helps insure that you will have the knife with you when you need it. If silent deployment of your blade is important, leather will probably be your material of choice. If wet conditions are expected, kydex/concealex and/or cordura may well get the nod. Will the sheath need to be jump qualified? Will the sheath need the ability to move easily from your belt to a pack or vehicle? How will the sheath/knife combo ride when you have on the rest of your gear? Does the sheath/knife combo allow easy getting in/out of vehicles without catching on seatbelts, doors, steering wheel, etc? What is your preferred method of carry: On your thigh? Lo-ride on the belt? Hi-ride on the belt? Under-arm? SOB or a Dundee rig on the back? and so on.
... and finally:
- What is my life worth to me?
If this is a knife that you think will ever be used for absolute life support, either in combat or other survival situations, you need to establish for yourself how much performance you are willing to compromise away for any other reason, particularly trying to save money by buying a cheaper knife. In such a consideration, my personal opinion is to buy as much knife as you can possibly afford, then a little bit more.
Stay safe, -- Greg --