Boy that's a tough one, there are just so many options...I find these are like backpacks...I buy them, then sell them, buy different ones, etc. because I'm always trying to find the right size, dividers, etc. I've tried about 392 different kinds...I finally settled on traditional aluminum boxes for my freshwater...and some large plastic ones for saltwater...
I like the CF designs boxes. if I can find them on sale. Love the micro threaders especially when its getting dark and I need to tie on after snapping my 12th fly off....