I am also in the Twin Cities and have just selected a HVAC vendor to install a new furnace and AC in my home. I could share my impressions of the contractors that I consulted. Would that be appropriate for this web site? I would not post dollar values. After my install is done I will be more than happy to share my thoughts on Flare Heating & Cooling. Thus far all I can go by is the quoting process.
One place I didn't pursue was Aspen Air. Look at the BBB web site and you'll find they have had 27 complaints in the last three years. Those complaints were probably more related to their duct cleaning business but it was enough for me to rule them out.