Recently had blinds fitted in our house. From the first phone call to the fitting we have been extremely happy. The guys are so nice and polite. We felt like we had time to make a decision about what we wanted and the prices are so reasonable. We have already recommend them to friends...
Most big box stores offer custom insulating window blinds, both made to order at the store, and by special order through some of the more reputable manufacturers such as Levolor. I would recommend avoiding the in-store blinds as they tend to be of lower quality and have very little R value...