Thanks to all-- no one I could find makes and sells cellular blinds (at least in this country) over 144 inches long. Our carpenter suggested putting a 2+ inch piece of cedar across the top of each window and then installing 144 inch shades. Today, as we sit around the table discussing Thanksgiving timing, my dad suggested, instead, a white piece at each window top which, when the shaded were installed, would become part of the stack. I think it's a better solution, although I don't love a 4 inch stack.

"like not having a cord dangling down" I have several Hunter Douglas corded cellular shades, and the cords don't dangle. They are fixed onto a small pulley installed at about my shoulder-height into the window frame which keeps the cord taut and contained and unobtrusive. I actually recall the installer told me they aren't permitted to install shades with dangling cords due to the choking hazard for children. I don't know if that requirement he mentioned is just for that installer, or a city Code, or a Hunter Douglas requirement. I've had my Hunter Douglas cellular shades for about 12 years, and did have to re-string the very large one once. It was not a big deal, and the shade was as good as new. I was told that the larger cellular shades will have the strings break sooner, just cause they are required to pull so much weight up and down. The smaller shades that I have, which have less stress on the cords, have not need re-stringing in 12 years. I don't know about the cordless shades, but I can tell you the corded ones I have seem like they will last longer than I will be in this house.

I have 4 very large 48 X 95 inch cellular blinds from Blinds to Go. I did not get top down. Mine are white but appear slightly gray because they are black out blinds and lined inside the cells with silver. I have Hunter Douglas in my other rooms. The difference I have found is in the strings. The Blinds to Go use white strings for the pulls and they get dirty, Hunter Douglas uses ball chain and is a continuous loop. The Blinds to Go have had to be repaired. The blinds got shorter and shorter over time and uneven. It seems the strings inside were catching or shrinking. I must say that the company repaired them and quickly, but I had climb up 12 feet to take them down and put them up again several days later and in the mean time I had no window covering in my bedroom. For me the price difference was worth buying Hunter Douglas. I purchased them through Home Depot. Also the Blinds to Go installer was horrible and they had to send me someone else to fix the initial install twice. Also the first batch of delivered shades were incorrectly measured. The Home Depot installer was very professional and timely.

My romans never looked wrinkled. They have a blackout liner that gives them some heft, so maybe that is the difference. However, they allow a lot of light to come in at the sides since they do not sit flush with the window frame. I have roller shades under them, but they are not light blocking since they make the room too dark during the day. I have privacy issues and can't just open everything. I curse my neighbors who refuse to turn off their flood light at night!