Internal filters are quieter (I don't know why I didn't think of that), heck, like I have stated, the quiet1 is quiet until you get up close, and that thing is a beast compared to those little things. That would be your best option.
these could also work.
http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+3579+3584+3632&pcatid=3632
http://www.petsmart.com/product/index.jsp?productId=2754088&cp=2767036.2769235&fbx=0&fbn=Taxonomy%7CInternal+Filters&f=Taxonomy%2FPET%2F2769235&fbc=1&parentPage=family&keepsr=1
Mind you I would go for a turnover rate of about 8-10 times per hour, which means about 24-30+ gallons per hour.