What size SeaSwirl for 225 Gallon?

[fantastic4]

Adding two SeaSwirls to each corner on a closed loop for a 225 gallon 72" Length, 24" Width and 30" Height SeaClear Acrylic.

Any recommendations on which size SeaSwirl to pick?
http://www.marinedepot.com/aquarium_wavemakers_sea_swirl.asp?CartId=

Also which size Velocity to go with them?
http://www.championlighting.com/home.php?cat=505

Closed loop will have Y output to feed both SeaSwirls.

Also considering Sequence pumps, however, I hear Velocity is a quieter pump?
http://www.championlighting.com/home.php?cat=490

Thanks guys!