Whats your price range? If price is no object then the sky is the limit. I have seen alot of skimmers out there and have read lots and lots of feedback on them and everyone that has a good skimmer likes there's and I have talked to a few people that have done testing and kept very good data on skimmers and they tell me that the lastest and "best" skimmer aka Cones are only 5% better than the last best model and and the best skimmer still only pulls 30% of DOC's out of the water, only a little faster so if you want a skimmer that will do the job you dont have to buy the bestest/latest one and spend alot of wasted money.