I would say go with the tunze streams over the big closed loop pumps. At 5 feet depth the view of the streams should be easy to hide. And the power difference between the options is a lot. And though streams seem costly, by the time you buy 2 pumps + 2 4 ways + all the plumbing the streams are not really that much more. plus the streams are much more versitile, move to new location, wave settings, adjustable etc.
just my thoughts.
just my thoughts.