Planning window replacement project in Seattle area in Washington, with ~12 windows to be replaced (currently single pane/aluminum).

I am looking to install higher-end vinyl windows. I've read through dozens of pages on this forum (and few others), and consensus is fairly clear on what brands/manufacturers constitute "high end". Unfortunately, it seems neither Okna, nor Sunrise or Soft-Lite are readily available in Washington. There are rumors Simonton might be available, but I am yet to confirm them.

Hence I'd welcome thoughts from experienced audience here:
1. Is it true Okna, Sunrise, Soft-Lite, HiMark dealer networks do not reach Pacific NW or I missed something?
2. If above is true, what would be the brands to consider in the "next tier". I can think of Simonton, what else? I know for sure Milgard, Andersen, Cascade, Jeld-Wen, Pella are available here.
3. Anyone knows of reputable window install specialists they can recommend in greater Seattle area?

Thanks in advance!