Opinions on my comments?
The nicest ones I have seen have been the Marvin Windows. The cladding (aluminum) is well applied. Slightly less beefy is Weather Shield.
I'd put the Andersens a notch down, and the Pellas a hair below that. These brands seem to be primarily vinyl clad. The builders seem to like aluminum clad better. The seams on these windows aren't as neatly fused.
A little wimpier (and cheaper) is the Jeld-Wen Caradco.
I'm about ready to grit my teeth and splurge on the Marvin Windows. Ouch. I need 20. At least I'm helping the economy.
Other suggestions? Obviously the most important element is the installer. I have a good one (who prefers to stay out of the selecting - probably a very wise move).