One of the professional members made a statement in one of their replys (not to me) that if you are going to stay in the house buy the best system you can. My son works for Trane is thoroughly convinced that I cannot go wrong by buying the Trane 5-Ton split that is a 19 seer system to replace my 27 year old GE split system. This may have been asked before but I couldn't find it, is it a good system? Are there any drawbacks?