hello I need to decide which furnace to install at basement: Bryant plus90i or Comfortmaker VS9. Both hvac installers provides 5 year labour/parts warrenty. Beside the big price difference ($1800), it has about 4%AEUE difference. It seems that, if purely based on these two differences, it does not worth to go with Bryant in money sense. There must be more differences that i do not know but they may be important during decision-making. Could some one provide any advice on this? thanks.