I switched to a Fishpond Waterdance pack several years ago and am very happy with it. I haven't used the F-C pack you mentioned, but it looks similar. I find that my Waterdance holds plenty. I routinely carry 4 medium size fly boxes, small camera, small first aid / repair kit, water bottle and all of the usual accessories. I still have room to stuff in an apple and sandwich and a rain jacket if I really want to. For me, having the weight carried on my hips rather than on my shoulders / upper back makes a big difference in reducing backaches.