You ought to focus more on the size and installment of your air conditioner, rather then a high end air conditioner. Since the huge factor is the installment, if it is not installed appropriately, you will deal with more problems later on.
One great reason to have a properly sized ac system is humidity control. When it runs, the evaporator coil temperature is below the dew point temperature. The result of this is that the moisture condensing on the evaporator decreases the moisture in the air BJ Refrigeration . This would mean a decrease in the humidity. This process cannot happen with an extra-large ac unit, as the run cycles on them are too brief for this to take place. So keep that in mind when youre shopping around.
Also, maintaining and fixing an over sized ac unit can cost you much more. The compressor for instance, with time, will wear out and you will have to get it replaced. If your ac unit turns on and off for 4 or 5 times in an hour, instead of the regular 2 or 3, it will wear out your compressor. There are numerous other factors to watch out for when shopping around for an air conditioning unit, so make certain to do some research and not be afraid to ask questions.
Now, at least you understand its not all in the name. Make sure to pay the additional money and get the ac unit installed appropriately, since that is the main thing. Sure, there are various other factors, but, not everyone has the budget for the air conditioner with better features. So getting it installed appropriately will save you quite a bit of money down the road.