One can spend a lot of dollars, not have a good install and windows that don't operate properly. High end - Anderson (plenty of dollars)
IMO, Certainteed are excellent windows - dual pane, low-e, argon, welded and sealed vinyl....(with outside molding). They are a "stick-in-the-hole" windows.
Windows (and doors) are the biggest cause for loss of energy in a home. The quality of the install to me is the most important. A window should prevent water and wind from entering the house. Un-seen problems can accumulate water and cause further damage. You will be miserable with a window that is hard to operate. If the installers shows up without a level, send 'em home. Each window should be level and plum and shimmed. A good seal (silly cone) is very important as well.
Oren "My doctor says I have a malformed public-duty gland and a natural deficiency in moral fiber, and that I am therefore excused from saving Universes."