i've had 3 estimates to replace my furnace and air conditioner and i just can't decide what to do. one company offered trane, another ruud, and the third goodman. i keep searching for someone to list furnaces from best to worst but it doesn't seem that simple. i don't want to waste money but i also don't mind spending it if there's a difference. i realize that i have to look at similar models from these manufacturers. i've read that it's more important to have the correct size furnace and a good person to install it. no one that has come out has performed a load calculation....but they all quote me on a 90,000.....is that a big deal. all three people to come out have been nice enough on the surface....how do i know what kind of job they'll do? can anyone help me choose?