Hi,
Here are the brochure and specs on the Laing E10:
http://completewatersystems.com/wp-c...04/LTBR-21.pdf
http://completewatersystems.com/wp-c...4/LTSS-301.pdf
Looks like a lot of good features.
One not so good thing is that the max temperature is listed as 140F.
I've used the several of the Grundfos 15-58 three speed pumps with good results. Very reasonable price -- $70ish I think? The three speeds provide a lot of flexibility.
I've not had any problem with using the cast iron case pumps -- have one that has been operating since 1996 and is still working fine -- this may be a function of water pH etc that the pump is running in.
Gary