Agree on the SCWD. Current restricting, and IME, after some point - will fail [esp in high Ca dosed tank].
Wavebox IMO is too large, too overkill. Sure is a neat product, but I wouldn't put one on my 58 [too much space lost, might still want more movement].
I ran a closed loop on my 58 for a while, but found the pump added heat to the tank [and noise to the room] and combined with seeing PVC in the tank ... was easy to replace with silent, less-power using Streams/etc.
IMO, a Sea swirl might also be quite bulky, IMO, for what it does. Also, it can make canopies/etc problematic - depending on your light setup [would have had to majorly modify my own canopy to fit the one I got on ... so I sold it].
Personally, while they're bulky in-tank - I find it hard to get past the low-wattage stream-type powerheads. Esp with the mini-streams coming out around this X-mas - IMO a pair or 3 would be the ideal water movement.
That's my take - but when it comes to seeing a powerhead + couple cords vs. PVC - I don't feel the PH's are that annoying [I don't like seeing PVC]. Nevermind the silence, the low power use - two factors that have me running my 58 [36 x 18 x 21] with the return, a 6060 stream, and a turbelle controllable.
