Check out the carry speed as well.
Having spent far too much on alternatives, my recent choice of CarrySpeed is in the "at last...." category.
This is very evolved, well thought out and neatly executed kit. http://carryspeed.com/
FS-Pro for heavy stuff = 1D4 body & 70-200 http://straps.carryspeed.com/ProductsView-1.html
Extreme for lighter stuff = 5D3 body & 24-70 II http://straps.carryspeed.com/ProductsView-3.html
Double Pro II for events work http://straps.carryspeed.com/ProductsView-7.html
I also use the SpiderPro system which is great for some projects, and there is a distinct advantage that the pins from SpiderPro and CarrySpeed are 100% compatible/interchangable. http://www.spiderholster.com/