well imho CS is an excellent entry level knfe, and a good 1 for the $$ - BUT BM is a MUCH better, albeit more expensive piece - just no comparison when ya have each in your hand, believe me - G10, CF handles vs zytel, better steel in the blade (no doubt in my mind about this point) better ergonomics, liner vs lockback(i im 1 of those people who find nothing wrong w/a well designed and manufactured lockback) the list could go on and on.
REKAT is the same, probably better in some areas than BM, though you have a smaller selection - the SIFU is hard to beat in a production knife imho - carnivour is darned good too
if you have the $$ for a BM, there are many other intersying breands also, spyderco, emerson, micro tech, etc
1 place on the net is selling the old model BM AFCK combo edge silver blade for about $65, a better deal on a quality knife is not available, imho - were i to be restricted to less than a 5.5" blade ala SIFU, and didnt have my crawford kasper, my #1 choice would be my BM AFCK black plain edge - knife fits my hand well, good ergos, 100% better than the AFCK11 in mho, and better than any CS too imho - wouldnt trade mine for a CS for whatever thats worth..
hope this helps ya out
sifu