I ordered our new air conditioner today.  It is a Goodman 15 SEER, 3.5 ton unit with a 95% effiency rated variable speed gas heater. I am installing it in the attic horizontally so I had it shipped with a horizontal A-coil.  It should be here middle of next week.  That means I may be installing it next weekend.  Yippee yummy attic dust here i come!