We are a Bryant dealer, so I am biased. :-) But when deciding between brands of furnaces, always remember that the differences between brands are so minute that you would be better to go with the company that made you feel most at ease instead of sticking with a decision based solely on brand name. They're all good furnaces when it comes right down to it.
The variable speed blower has been likened to a gas pedal. Instead of only a low or high speed, it will adjust to what your home needs for heating. Here in Oregon a high efficiency gas furnace with a variable speed blower qualifies for a $350.00 tax credit from the state department of energy - might check into that as well.