What are your existing windows? Wood, Vinyl, metal, etc.?

I currently have single pane wood windows.

If you want the most glass that you can get back, you can go full tear out/new construction.

You will need to figure on the added expense of all new interior trim but it is certainly an option.

As far as the window comparative, I tend to think that the Okna window is one of the top 3 vinyl windows made today.

+2 for okna. The Earthwise group generally offers solid products, but the okna is an elite level choice. Regarding install method, you are typically gonna pay a premium of $200 give or take to go full tear out. Most folks find that hard to swallow... Makes sense though if you are already replacing you siding or interior trim anyway.

When HomeSeal mentioned AT LEAST an additional $200 for new construction, he is referring to each window. it could be more depending on the circumstances.

Thanks for the insight. I have been leaning towards Okna mainly because I wasn't able to find any info on the Earthwise group but that changed recently and the windows seem to be fairly solid. The caveat is that there's a network of builders and each one implements the design differently. I'll stick with the okna and get a price on the full tear out. Replacing the interior trim won't be a deal breaker for me.

Thanks again!