[welcome]
You might want to post this in the new to the hobby forum.
The amount of flow you need/want will depend on what you plan to keep. I would run 3-4 Seio 1500's, one in each corner. That would get you a nice solid flow. You have a boat load of options depending on how much money you have to spend. You can add closed loops, powerheads, waveboxes, etc.