I have an Eshopps Sump with my 180g. First prefab sump i've ever owned. It came with the system i bought as a whole. I do like it, but I've always made my own sumps. Acyrylic tanks are expensive, but 40g breeder tanks are cheap. Acrylic sheets are cheap at Lowes/Home Depot, so you can setup baffels however you want. Aquarium silicone isnt too pricey, and when used liberally, will hold acrylic baffels in a glass tank without issues. Ive been making my own sumps out of glass tanks with acrylic baffles for years.
I made a 20g long sump for my 65. Tank cost, 35 bucks. Acrylic cost, 45 bucks, Silicone cost, 20 bucks. Total cost less than 100 and it works as well as any prefab sump. Better in fact. I baffled it the way i wanted, based on what i wanted to do as apposed to using the prefab setup and adjusting to make it work.