i've had several, small and std size, FRN handle and the pro series w/the alloy handles, they are ok for what they are, the alloy handle ones have a little better steel (IIRC AUS6 on the std vs AUS8 on the pro model), the only con imho is the liner locks arent the best, i have had to send a couple back for replacement, just keep an eye on the liner lock and ya will be fine with it imho.
the CRKT kasper is really close in dimensions to the crawford kasper, really close, almost exactly, i liked the design so much i now have 2 crawford kaspers and a perfigo lol, of course the CRKT is nowhere near the knife the crawford is.
the alloy pro models are hard to find now, but i have seen the FRN handle ones fairly cheap, IIRC ~$25=$30 or so, one with a coated blade might be higher, i wouldnt want a coated blade myself though, they scuff up too easily for me, YMMV lol.
the are an excellent design, but ya gotta remember they are a CRKT so imho they really arent that "tough" imho, the steel is ok even on the std models but again watch that liner lock, thats the weak link.