Generally speaking, if rate WAS THAT important, credit cards would not be at an all time high. If payments WERE NOT that important, cars would not be financed for 60 months. You may have a valid argument for me if you had zero debt, but it had better be a strong one. But that's another discussion all together.
Have you ever asked yourself this question about a Pay Option Arm:
Why would someone want a low payment rate of 1.95% (or throw in a number) when they can get a 30 year fixed rate at (interest rate)%?