Count one more for the AquaC Remora. I have a Nano edition on my 24g Aquapod and I love the thing. I was a little skeptical at first after I had a few people tell me that a skimmer wasn't necessary on a tank like mine but the amount of organic matter it pulls out in only a few days time is pretty impressive. Another skimmer I've heard good things about but don't happen to have any personally experience with is the CPR Bak Pak.
Before I bought my Remora one problem for me was the noise reviews, they were all over the place, some said loud some said quiet. I've been pleasently surprised with mine, I can't hear it over the light fan or the mini-power filter. And even with the lights off it's barely noticeable. It's in my living room so it's not like it's hidden around the corner.
That is one thing to be aware of with the Remoras, some are louder than others...
Both...The aquaC did a decent job, but the CSS65 kicked its but, pulling out some of the blackest skimmate, even better than my euro-reef in my bigger tank. plus, it was much quieter, almost silent. where as the aquaC was super loud. Im not trying to start a flame war, just giving my opinion from using both, and the best part is the CSS65 was about 1/2 the price.