I'm choosing between two new furnace installations. Both are installing the same furnace (Bryant) and both have been in business in the area for many years. I would be comfortable going with either contractor. Their biggest difference appears to be one is offering a 10 year parts/labor warranty vs a 5 year parts/labor warranty. The 5 year warranty is about $150 less than the 10 year warrant on a $2800-$2900 total installation (90+ 2 stage/2 speed 90,000 btu). Is the $150 worth the additional 5 years?