Are you replacing an air conditioner or a heat pump? These days and for many decades, never buy just an air conditioner, buy a heat pump. I’ve had them in all my houses since the 80’s. They are much more efficient for both heating and cooling and will save you a lot of money. Then get a smart thermostat like the ecobee and configure it to use geofencing, and you will save more money on cooling bills, plus you can operate thru your iPhone.
Also, if you are going to spend this kind of money, don’t go cheap. Single stage is cheap and more inefficient than a dual stage.
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