I'm remodeling (or resurrecting or maybe it's "reviving") a 1963 modern ranch. It had the original single pane floor-to-ceiling windows in the front of the house, including trapezoid ones at the top, replaced. Same with the other sides of the house, which were aluminum sliders.
The new Windsor Pinnacles are in and are fabulous. When they arrived in the garage my contractor who builds high end custom homes (well, before this lovely recession or whatever it is) tried the slider. A man of few words or emotion, he beamed and said, "These are no builder grade windows." Same reaction from everyone from the DitecTV guy to the electrician. These were custom made to fit the holes so weren't cheap (ahem!) but, hey, they'll last another 45 years. And I get the tax rebate ;)
I had read a little here about them but just wanted to return the favor for all of you doing window research.