I cannot say enough good things about this sump:

http://www.thatpetplace.com/proflex-model-2-sump-75-gal

They also have a model 1 that is a bit smaller and costs less. I have the 2 on both of my 40g breeder sectioned tanks. Sweet sump offering a lot of configuration options. I added a DSB in the first two sections and the fuge area is huge. Skimmer in last section with return pump.