I'm not sure what the current line of Eshopps sumps looks like, but I have the R-200 and love it. They don't make this line anymore but did have a similar line when I looked last year.
The design I have has a dedicated fuge that gets water straight from the first drain chamber, so all the nutrients are still there. The rest of the water flows through the drain chamber, to the sock(I replaced with a filter cup), then under the fuge to the skimmer section, and then to the return pump chamber. The fuge also flows to the return chamber.
The things I like: dedicated fuge with low flow and nutrient rich water; big skimmer chamber.
Things I dislike: very small return pump section - somewhat limits your choice of pump; return chamber is behind the fuge, which makes maintenance somewhat inconvenient, especially if you have a short stand.
But, I like it enough that I bought a used r-300 for my upcoming new build.
Edit: it looks like the AR-200 is the current version of my sump. I hope my review helps.
Cheers!