Wow, You had to wait that long? I went with Harvey Windows, Which are rated the best vinyl windows and i would highly recommend them, It was 3 weeks for the build, I had certainteed vinyl replacements from back in the 70's as well, Just about the time they had just came out, Not very efficient as they were drafty as heck in the winter, My bedroom was always cold and one windy night while at my computer i noticed the curtains moving and there was an 1/8" gap in the window and the cold air was just rushing in, Also went with a new cold fired boiler as well and have already realized a big savings on that in just 5 mos, The windows will absorb the sun in the winter and reflect it in the summer so i should realize added savings as well, My house was built in the 40's so we have been making steady improvements over the years but a big push this year with Boiler, Windows, Roof and Flooring.
https://www.harveybp.com/