The Infinity 21 is the most quiet and energy efficient system you can buy. It has a variable speed compressor. What this means is it can operate at between 40% and 100%. When you have a system installed it is designed for the highest temperature in your area, but its only that hot for a month or so. The system would be over sized for the other 10-11 months. The Greenspeed Heat Pump will vary between 40% and 100% so its perfectly sized for any time of the year.
The Greenspeed also removes up to 75 gallions of water per day. It will keep the humidy down on those sweltering hot days.
The winter is where the Greenspeed really shines. It will be blowing warm air down to temperatures around 10 degrees.