I personally recommend a Cold Steel knife. I love the Tri-ad lock. Very very strong! Recon1 is the model I think you should consider. I have 4 of them.
When it comes to recon 1's, you really have to consider 2 things:Cold Steel Recon 1 in XHP. I'd recommend the tanto version, as it's the only one that's hollow ground for the main edge but it's still got a strong and usable flat ground tip. Cold Steel's XHP heat treat is top notch, if you can still find it, otherwise they're now being offered in S35VN.
The mini for the pocket,
And full size when you rock it!
(Or XL if you're feeling CRAZY)