open to all suggestions. given winter rate for elect =$.1125 kwh.,elect summer rate =$14.5 kwh, gas =$1.30 therm, phila area (south jersey).thinking of amana 95% 115k 2 stage vs furnace with amana 5 ton 16 seer 2 stage r410a hp.can any other system compare bang for buck and performance (seer,cop,hspf,eer)? heat calc was done 15yrs ago also duct design checked by engineer at same time and nothing has changed. would need manual j anyway though for rebates. any suggestions would be greatly appreciated. anyone interestd in bidding this job??