No, I'll be using a HOB overflow box.
I am going to go with the 800 gph overflow box, lose the prefilter foam, use silicone tubing to avoid elbows (also decrease flow rate) and go from there..I am currently planning a relatively simple, but pretty thorough system:
Starting from beginning:
Biological (a bunch of pot scrubbers)
Drip tray to foam polishing filter, with polyfil below it
flow into center chamber, which will have extra ceramic bio beads and a few pot scurbbers, only as a catalyst for any future tanks I need to start up, as well as the heaters.
A divider with a drip/slot wall dripping falling into the next chamber where the pump will be.
Obviously I'll have to play with the flow to make sure its not too much/too fast through the filters but it should work out great.