[onewhippedpuppy]

Even with replacing windows in a 1991 house I am with Paul, the energy savings made me giggle. That, along with not getting snow drifts on the floor by our N facing windows. We went with Andersen vinyl-clad dual-pane and are happy. Color is Terratone, sort of a bronze/brown, it works well with our red brick up front.

You are probably looking full custom, which is much more expensive. Another option if your windows are close to a stock size is to go slightly smaller and then build out or replace the casing trim and framing to fit the stock size window. If you DIY, it would save you some money. Also, most window companies will come and measure for you, even if you plan to DIY the install.