Thanks for all the feedback guys. I completely forgot to include intended use, so my apologies. He’s about like me in that he works in a production environment and needs a solid knife for daily tasks like opening boxes, maybe breaking a corner on a plank of wood or sheet of plastic. That kind of thing. I was also looking at the Benchmade Freek or Bugout since again, I’m trying to limit it to more well known brands that he’d know about. He had also expressed interest in one of the Kershaw Launch variants when he got the Kalasnikov.
Any knife can cut a box but, if you want to break of wood or plastic corners, none of the knives you've mentioned so far would be something that I'd use for the job. Why waste a $100-200 knife doing that?
You'd need something w/a much thicker and heavier blade, in which case, I'd simply suggest a CRKT C/K Folder which costs under $20. You can use and abuse it all you like and, if you don't want to bother sharpening or regrinding the blade, you can just buy another.
That would be my recommendation for the use suggested. However, for just carrying around, showing off and doing "normal" cutting tasks, any of the other knives mentioned would be fine.
I've got over 140 knives, including a Manix2 and Para2. I prefer the Manix because it fits my hand better and it's easier for me to deploy. I think the "one-handed" closure thing is over-rated and unnecessary but if it's important to you then the Para2 would be the call. I don't have a Grip or Bugout but I've handled them and they're fine too.
I think the Grip w/the thumb hole is a Spyder ripoff which is why I've never bought one and the Bugout is small and light but I'm not partial to small/light blades. Nothing wrong w/them if that's your thing but the only reason to buy one of them over a Spyder IMO is the handle which is a bit more ergonomic and "may" feel better in your hand.
I've got about 20 autos including a Kershaw Launch and a Kalasnikov DL. Both are ok but if you're going to buy an auto they are at the bottom of the barrel. Nothing "wrong" w/them but, between the 2, I don't see any improvement in buying a Kershaw. For a "better" auto, I think you'd need to move up to $150-300 and focus on a BenchMade, MicroTech, ProTech or Piranha auto instead.
However, IMO none of the knives I that I've just mentioned should be used to break boards or plastic. I still recommend the C/K Folder for that. It's a beast of a knife for very little money, that'll fit easily in a large/deep work pants pocket (at least it does in mine) and can handle any job mentioned w/a 8Cr14Mov steel blade (which is similar to AUS-8) that can be easily sharpened on the spot w/just a pocket stone.