Aight...
Seeing that you are from the north, the guys around my shop recommend that you go with the sliders. Think of it this way.
- It's cheaper
- It's easier to install
- even if it DOES magnify, you will love it half the year, and can open the screen during the warm half, too..
Or.. you could just move to FL, where you could leave the damn things screened, and that would be that...
Ray