If I have the money I like aluminum clad windows I honestly do not think altitude has much to do with it.

I think that just about any quality material from a reputable manufacturer, will hold up in this climate. You definitely do not want something like thermally broken aluminum, but I can't see a reason why vinyl, clad wood, or fiberglass wouldn't do just fine in your case. All are assuming that the glass coating are properly specified per elevation and designed for those altitudes.

I'm looking for similar info but worried about the uv and hail. Will vinyl hold up to these as well as aluminum? What is thermally broken aluminum?

Would be interested in what you chose and how it's holding up. On 2 previous houses I've lived in, the vinyl warped either on the sliding track or the outer frame.

If it was a production built house, I can promise you that they used the cheapest vinyl window they could get. They always do. Not surprising, that product doesn't tend to last as compared to a well engineered and built product.