I strongly commend you for taking the time to research windows for your new build. Most people don't, and regret it down the road. That said, IMO, you may as well do no research if you are going to settle on those choices. Typically builder grade. You are not going to find much positive about either model (or brand for that matter) from industry pros.

Thanks, HomeSealed_WI. Do you know if those two options are at least comparable? And more importantly, what might you recommend instead?

If you troll through the threads on the board, the names that you will see come up regularly are Okna, Sunrise, Softlite, and a few others... To take any subjectivity out of the equation, I recommend looking at the thermal and structural performance ratings. The top (mainstream) products on the market are getting .25-.26 u value in standard double pane (with shgc .25+) , air infiltration of .01-.05 cfm, and design pressure 50+. These ratings are generally very indicative of the type of quality that can be expected.

jade,

Where is the home going to built and at what orientation. There are glass performance options that should be considered in the process as well as geographical limitations on where you can get certain products.

Thanks and good luck with the build.