Still trying to decide what type of system to install and how to pay for it. The latter being the most difficult. Rheem's mod looks awesome and if $ wasn't a concern, I'd have it in tomorrow. Anyhow, I found a very good deal on a new, properly sized, 16 SEER, 2 stage A/C unit, from a very reputable dealer (not a Rheem though) I'm think of having that installed with my existing 17yr old furnace (no variable speed blower though), and then replacing the furnace in a year or two. I'm told by the dealer this will work, but the new A/C can only be set up to run on the 2nd stage. Still much better than my old A/C, which is shot anyhow. Is there a way I can make use of both A/C stages until I replace the furnace? Will this setup cause any damage to the new A/C? Thanks. It's amazing how much information and help is available on this site.