Well Spike, since nobody has answered your specific question I will give my 2 cents...
Coral and (assuming) cured live rock ONLY. No fish...right?
Yes. You still need a skimmer. Lemme explain why. When you feed your corals cyclop-eeze or phyto or whatever you are going to feed them, when that stuff hits the bottum of the tank and starts to rot, a skimmer will be most valuable.
Also, hard corals "slime" and softies "smoke" a mechanical filter nor your live rock will eliminate this. A skimmer is the best way to rid it when it happens. The slime or smoke can accumulate to toxic proportions.
BUT as mentioned the AquaC Remora with a skimmer box is a good choice...It's my fav anyway.
Unless you have a sump, then your possibilities are endless.
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