I have the Aqua C Remora Pro and Tunze 9002. Both are excellent skimmers and have different strengths and weaknesses.
The Aqua C Remora is plug and play. It hangs on back of tank and all you do, is adjust the collection cup height. Some people love it and others think it does not pull enough. I think it does a great job. However, I found, that using it with the highest recommended powered pump the better.
The Tunze 9002 is highly recommended for Nano tanks, based on Nano-Reef.com forums. I also have this skimmer on my Solana tank. I can tell you, that it takes a bit to "dial it in". On some tanks, you need to buy a modified collection cup that is rectangular rather than round.
I found this unit does a great job, but does have to be adjusted every once in a while. A tidbit that works much better for me, is to set the unit about 1 inch higher than the recommended height above the water line.
Widdy, the recommended URL for review was very good.
Good luck,