Bio Pellets or Refugium

[intarsiabox]

I am in the process of setting up a new sump. I was going to go Overflow/Skimmer Section=>Return Section<=Refugium. However I could also increase the size of my skimmer section to have room for a Bio Pellets reactor and also have a larger return section while eliminating the refugium. This would also make plumbing easier as I only have one corner overflow and would have to tee-off to provide flow to the refugium. Is this a good idea or would I be better off with the refugium. My other design was to go Overflow/Skimmer Section=>Refugium=>Return Section, but this results in full flow through the refugium and I don't know if this would be too much flow. I have a single 1 1/2" overflow and am planning on using a Mag9.5 as my return mostly because that's what I already have. Any thoughts?