Planning on replacing a 2T 11 SEER heat pump split system with a Goodman 2T 16 SEER DSCZ160241 compressor and a AVPTC313714 air handler. System will be on east coast of central Florida where temperature dips into the 30's a few times a year at most. Based on my interpretation of previous postings, the dual stage compressor coupled with a variable speed blower motor will result in slightly better efficiency than the single stage compressor and better humidity/comfort control. Is my understanding correct? Do I need a specially matched thermostat for this system or will my simple digital thermostat suffice? If the temp only dips into the 30's a few times a year do I need aux /heat strip? Is UV light worth considering? If so, why?