I recently purchased a SKIMZ SM 201 Monzter E-Series protein skimmer for my 187 gallon tank. SKIMZ is a company that builds their skimmers in Singapore. The skimmer is rated by the company for tanks 200-500 gallons. SKIMZ uses their own brand of pumps that are made in Italy for them, and the pump that came with this skimmer draws 20 watts which was a big improvement on the energy usage of my old skimmer. The SKIMZ SM 201 is 9.4" square at the base and stands 21.8" high. The price was $449.
The skimmer draws the water into the skimmer from underneath:
Bubble plate:
Build quality is excellent:
Finally, most importantly the skimmer does the job it was designed to do: