We used to install a lot of Jeld Wen and Pella when I worked in construction.
Pella has a lot of law suites going on right now over there windows. Apparently sold windows with gas between the pains.
That's a good thing, everyone sells double pane with gas that insulates and blocks UV. When it leaks, moisture gets in, and bad news.
You want gas and LowE if you get direct sunlight.
The last house I built I put POZZi casement in, loved the view, hated the handles!