We are looking to buy a new furnace. Current one is old, plus we have additions on the house and need more btus. Problem we are running into is every contractor that comes over has a different opinion on what brand is better - Lennox, Trane, Carrier, etc...We know we want a 90% efficient, 2-stage variable, but we just don't know which brand to go with. (The prices have been from one extreme to the other.) Want something reliable, but don't want to go into debt to afford it! Any advice??? Thanks.