I have a reputable contractor that has quoted me for both the LP9C and TG9S (either/or) plus a matching condenser unit. My question for the masses is whether or not it is worth the extra cost to upgrade to the LP9C. Original quote was for TG9S and I asked about getting additional quote for the modulating Acclimate model. What are the biggest benefits and am I going to notice a big difference in a 1400 sq.ft home. Thanks in advance for recommendations.