You should focus more on the size and installation of your air conditioner, rather then a high end air conditioning. Because the big factor is the installation, if it is not installed properly you can face more problems later on.

One good reason the have properly sized ac system is humidity control. When it operates the evaporator coil temperature is below the dew point temperature. The result of this is that the moisture condensing on the evaporator reduces the moisture in the air. This would mean a decrease in the humidity. This process cannot happen with an oversized ac, the run cycle on them are too short for this to happen. So keep that in mind when you're shopping around.

Also maintaining and repairing an over sized ac can cost you much more. The compressor for example, over time will wear out and you will need to get it replaced. If your ac turns on and off for 4 or 5 times in an hour instead of the normal 2 or3. It will wear out your compressor. There are many other factors to look out for when shopping around for an air conditioning unit so be sure to do some research and not be afraid to ask questions.

But at least you know it's not all in the name. Be sure to pay the extra money and get the air conditioner installed properly, because that is the main thing. Sure there are other aspects, but not everyone has the budget for the air conditioner with better features. So getting it installed properly will save you quite a bit of money down the road.