New owner of 1960s 1 story cinderblock constr. house (1600 sq ft). Currently have Tempstar 3 ton package unit. Outside fan runs but came home from long weekend to find no air blowing inside. Compressor alone is 10 yrs old. Had contractor in yesterday. Told me to assume previous unit worked well (I've only had the ac on once for 7-days when I had company; seemed to work OK). Three dif inspectors (pre-purchase; insurance; termite) have told me I have great insulation in the attic. I guess that's why I'm comfortable in the house with just the fans and windows/doors open. Contractor wants to sell me 12 SEER Tempstar 3 ton package system (slap in) for $2800. I'm told that in January '06 FL has new regs which will prohibit new installations below 13 SEER minimum. Contractor told me can't have higher SEER system because old-style duct work (wrapped not flexible) can't accommodate. Does this make sense? Im concerned about buying a soon to be obsolete system. It's got a ten year wty on parts/compressor. But contractor told me the Tempstar I have and the one I'll get are beasts to work on. I really don't want to revamp the ductwork. I don't plan on doing any significant remodelling. Any advice appreciated. Thanks.