I use these in my fishroom from AOA, made by the same company that make the Nexus filters, made for ponds and very powerful, will pump up to 5.5metres depth and will do 130lpm at 1 metre depth.
Uses 106 watts and according to box runs at <50 dba, I find them very quiet with little vibration.
From your picture, you don't seem to have a lot of deep tanks, you may get away with one of these instead of 2 x LP00.
http://www.aquariumproducts.com.au/catalogue_products.php?prodID=4022&catID=14