My A/C system is going out and needs to be replaced. I was wondering if I could get some advice. I have 4 quotes so far and another coming tomorrow they are all pretty much in the same ballpark. As far as brands go how would you rate the following: Luxaire, American Standard, Carrier. Also we currently have an R22 system, one of the quotes I have is for an R22 system and the others are for the new Puron systems. Which one should we go with, Puron or R22? I do not know much about how these things work (I am learning) and I thought I could get some straight answers from people who are not trying to sell me their product. Thanks.