The Iwaki pumps are about as good as I've found. I'm doing much the same as you are, trying to choose components for a new system. The thing is there are 2 types of Iwaki pumps.
The WMD denotes the pump has a american moter and cooling fan. These are louder, hotter and shorter service life, but at a savings.
The second type is the japanese moter: quiet, cool running, long service life, but higher cost.
If you get the japanese built type they have a differant designation of MD instead of WMD at the beginning of the model #.
The best price I've found for a MD-30RLZT is $208.00 so far.
|