Go with a downdraft skimmer. I use a Reef Devil ETS on an 80 gal reef. I purchased it for $200. They have other more expensive models available. But, the highest quality skimmers feature a downdraft design.
Deltec are the best, im saving for an AP703. But Aquamedic are cheaper but still kick some foam. Dont bother with any of those converted shower head efforts. HSA i think tere called.
I would like to hear what is said on this subject as I will be loking for a new one too...I was thinking of the red sea berlin turbo or the super reef devil...better of the two? for price?It is for 55 gal,20 gal sump...