I'm shopping around for a reliable outfit to install a new gas hot air furnace.   I've been using Metro for years for service, and will certainly get an estimate from them, but I'm wondering if anyone has some recommendations for some other possible outfits that do this work (and/or a strong recommendation for one brand of furnace over another.) Thanks -David Klahr (As usual, I'll collect and then disseminate whatever suggestions I get in the next few days.)