I need a new pump. I'm looking at the Pentair 011018 or the new 011055 model (I need it to be a Pentair pump since I already have a SunTouch solar controller I want to interface with). The 011055 would run me about $150 more than the 011018. Is it worth it? So far as I can tell, the only difference in the new model is a rotatable control panel. Does anyone know if there are any mechanical or electroinc improvements with the 055 that make it worth the extra money?