I am in the process of replacing my present Heat Pump system. I have a Bryant 5 ton with variable speed A/H providing cooling and heat to a 3000 sq ft house w/10 ft ceilings on the west coast of Florida. I've had three quotes from recommended contractors. Each sells different brands and, of course claims their's is the best. Each also did a Manual J load test and 5 ton seems right to lower the temp on those hot days. I'm looking at the following models: Lennox XP19, Amana ASZ18 and Trane XL19i. Each will have their matching variable speed air handlers. In addition, I'm also adding an air cleaner and heat recovery unit for hot water to complete the system.
Assuming all contractiors are honest, professional and reliable, any preferences on the brand? Also, how can I check out these contractors in addition to any references they give me to make sure they are as good as they claim.