Depending upon your requirements for a cooling system you may be able to use either a window unit or central air conditioning. You want to chose the most cost effective system for getting the job done. There are many name brands but I find that all brands are good thought many brands are more "known," or "famous." For example "Carrier" is a very famous brand. There are several other famous brands out there also. The key is to get your needs met in the most cost effective manner that you can.