The heat pumps in my older (1940's) central Florida home are shot and must be replaced. It's a 2 story home with 2 central units, little to no insulation, and lots of windows. Have had 3 estimates. The first guy sells Trane and Rheem and recommended 2 ton Rheems, 12 seer. Said that would give me the best bang for my buck. The 2nd guy sells only Rheem and recommended 2 ton Rheems, 13 seer. The 3rd guy sells Trane and Rheem and recommended Trane, 14 seer, a 2.5 ton unit upstairs and 2 ton down. My questions: 1. Is there a significant difference in quality Rheem vs Trane? 2. Central Florida is hot and humid. What seer rating would make good sense? 3. The recommendation for a 2.5 ton unit upstairs has me confused. The guy took measurements and plugged it into a computer program. He said the recommendation was 2.3 but since they don't make them, he recommended 2.5. Should I be looking at a 2.5 ton unit?
Many thanks in advance for any thoughts and/or suggestions.