For dual pane available at HD etc I found Pella was allot cheaper maybe
900 vs 1100 for the Anderson I went with. Pella have the screen on the
inside , that will let in bugs when you open it to close the main door.
Also Anderson condense less, at a higher humidity than my Pella. I am
happy with the Anderson. Maybe you are looking at the higher end Pella
that has triple track and in screen options. Anderson is quality, I just
did not like the screen issue as I hate mosquitos .