Good input. Sorry for the "equipment" talk on the chemistry forum. The only reason I brought it up is there are often "how to run" questions about GAC and GFO.
For me, changing out media is not my favorite job. I want it to be easy. My Fluval was kind of a pain to work with. Priming it was a chore. It was too big for what I needed and had too high a GPH. I wanted smaller, lower flow and easier. Since it is for the basement sump, noise is not at all a concern.
The Eheim Classics look great. Old school, one big canister. They are well liked and respected...but... They have to be manually primed with a siphon, no quick connect hoses, which I wouldn't like. The Eheim Ecco, looked good until I saw all the complaints of fragile multi-function handles. The Eheim Pro are too big, too expensive and are way overkill for my application.
The Magnum HOT looked interesting, but wont work with my setup. The Magnum 350 has mixed reviews.
The Filstar looks good, but only the smallest model with the single basket (which may have been fine) was at the $100 price point.
This brought me to the Marineland C series. Very good reviews, the smallest model the C-160 seems just right size and flow, has a primer that is supposed to actually work. The C series has the top rating on the Cichlid forum, just above the Eheim classic. It does only have 10 reviews since it is a new medel compared to 50 for the #2 Eheim classic. and 100 for the #3 Filstar.
http://www.cichlid-forum.com/reviews/category_display.php?CatID=104&sort=rating
BTW, I like this section of the Cichlid forum with the user reviews. I wish RC had something like that.