Many people have trouble purchasing an air conditioning. Many times we have a habit of just focusing on the brand names of the air conditioner. And decide which one is better, but there are more things that you should look at besides the name.
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 youre 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...