Hello. I'm getting close to buying a new 3 ton gas pack for my home in Kentucky to replace my 18 year old 10 SEER Rheem. Everything I read about the XL1400 looks good including the variable speed drive and 2 stage gas valve. Problem is that it costs about 1100 more than the new XL13C model. I think the XL1400 may qualify for an energy rebate which is good. The XL13C model is new which kind of scares me. Anyone out there care to share their wisdom with me? The installing contractor I want to use has a great reputation and I plan to buy through Home Depot to take advantage of some gift cards I got by cashing in frequent flyer points.