Ok, instead of asking if it was worth it to upgrade from 60 to 75, and yet hearing nothing about the upgrade, let's run a poll to see how many upgraded from 60 to 75. I for one, will not upgrade. Even in Minnesota winters, so far the 60 is still enough range (133 miles at 450wh/mi in the medium cold days i.e. -10 to 10, or 120 miles at 500wh/mi at the coldest days).