My #1 concern is noise. I have a warner as-150 and the noise is unbearable. I even sold my vortechs in favor of tunzes because I hate noise that much. I am looking at the 9010 or the 9410. The skimmer will be placed in sump. I have a 90 gallon display with about a 20 gallon sump. I have a light bio load, 1 yellow tang and 2 clown fish and a few acros. The bioload will increase gradually however. Do I have to buy the extension set for the 9010 to use in sump? Is there any benefit of the 9410 over the 9010 or vice versa? Thanks.