Hi, I'm in Sacramento CA, and I'm about to get Dual Pane windows installed in my house. My wife and I are debating on whether to get Dual pane with argon and Low E on three on the seven windows. The cost is $64 extra a window for Low E and Argon, but these three windows hardly get any sun.

So is it really worth it to get the Low E argon filled dual pane windows vs just a dual pane window?