I'm not insinuating CRK, Hinderer, Strider won't stand up to real use; however, will YOU be willing to put YOUR $400 knife into real use? If that's going to be tough for you, I recommend a Spyderco, PM2, GB2 or Military. They will all be a huge step up from your CRKT. I always reach for my PM2 when I have real work to do, and it never disappoints. Given that it's flat and fairly light, it should carry awesomely in a flight suit.
The GB2 strikes me as a bargain for a well made hard use folder that's almost tuxedo clad--it and the XM-18 Bowie are on my want list, but that niche in my collection is pretty full (and money is tight).
The 'Zaan and 21 are both great knives, but for some reason the 'Zaan gives me a little something extra. Maybe it just feels more substantial--I definately love the blade shape.
I thought my son had an M-16 around for a comparison pic, turns out it's an M-14 which is a pretty large knife. Note the PM2 looks a little more stubby in the pic than in real life due to perspective. (Tanto 'Zaan)
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Here's a 21 thrown in for comparison. (Regular 'Zaan). Note that perspective is still in play, this time making the insingo look a hair smaller relative to the others.
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Perhaps the PM2 doesn't look too sexy beside the others in those pics. IMO it's beauty comes from design, function, utility, and price point. The 'Zaan is just pure awesomeness though. The GB2 might sit in a good spot between the two, which is why I want one so badly.
ETA: I agree with what others are saying about the 0801. Hard to beat for the price and it's the best flipping action of all my knives. It might be a bit heavy for a flight suit, but carries well in jeans and such. It's thick behind the edge.