Not to be a corporate flunky or anything but if you're looking for a good product that is backed by a large company, go to Home Desparate oops I mean Home Depot.
if you're looking for IMHO the best product, look for vinyl clad wood, triple insulated (since money isn't a problem), UV protected and if you want to get really fancy, the ones with the built in shades.
I used to install vinyl windows and here's why I say vinyl clad wood frames:
- ALuminum transmits heat and cold
- Plain vinyl isn't as structurally sound as vinyl clad wood
- Wood doesn't transmit heat or cold.