I've used Spyderco, Benchmade, Strider, CRK, Buck, Case and many others. The one thing I've found about folders is that they're just not very strong compared with fixed blades, unless you get something so overbuilt it feels like a refrigerator in your pocket. So the idea of a "robust" pocket folder in my opinion is something of an oxymoron.
A couple of thoughts...
Get something you like, lightweight and comfortable to carry, and try to have a Busse available in your vehicle or other place you can get to most of the time for heavy-duty chores. One thing I would not do is pay a lot for a folder. You'll just end up babying it when you shouldn't worry about breaking a blade if it comes to that. I got so turned around at one point that I was carrying a high-end custom "tactical" in the $500 range (not even close to the most expensive folders I've owned) and also an Atwood "Prybaby" so I'd have something to use for everything other than light cutting. I finally realized I'd be better off with a $50 Case copperlock and use it for everything without worrying about snapping a blade now and then--just buy another knife. Actually in my experience Case, Buck and Benchmade have been pretty good about replacing broken blades on folders for free or for a very reasonable price.
That's the one area Spyderco comes up short, in my opinion. I like the Military and have carried it, but not long ago had the experience of snapping the tip on an expensive carbon fiber Native and was told by Spyderco customer service that they will not replace a blade under any circumstances, although if it is inspected by them and proven defective they will replace the knife. If you go to their site and read their warranty, it basically says the same thing. To me, that's just not a very competitive business model to follow when other knife manufacturers are happy to replace broken blades on their folders.
Edited to say: I do have a Strider DGG SnG, and it is thin and light enough to carry comfortably in jeans. It is solidly built and with the unconditional warranty, I would put confidence in using it hard. Only downside is the blade and especially blade point are thick enough to negate one of my main reasons for carrying a folder, which is for performing fine point-work on delicate tasks which are cumbersome/tedious with a larger fixed blade. Ever try to pick a splinter with an ASH-1? The SnG isn't much better.