well, the idea of a HOB fuge is excellent, and will help with water quality and give you a little more water volume.
as far as the cpr aquafuge...i don't know, never used one, but i do know that i built a DIY aquafuge knockoff for a 1/3 of the price. 1/4" acrylic, some weld-on and some PVC parts and there you go...HOB fuge for ~30 bucks.
HTH