Definitely the 6'8 or a 7'. An 8' will leave you very little room between the moulding and ceiling. You have to factor trim around the doors into the equation as well. Is this a traditional or contemporary build? If you hang window treatments (i.e., drapes), they need to be hung just below the molding, or so the experts say :) This enlongates the windows and looks great. There are some differing rules if you are doing a valance and have higher than 9' ceilings, but with 9' you should hang below the molding for sure. As far as the 10' patio door - hard to say without a plan. I love the idea of a wall of windows, but would have to see it in plan form to see what other space you have. I must say though we were at the Wynn in Vegas a few years ago and one of my favorite things was the wall of windows across from the bed (the curtains were on remote!). Beautiful view and if you have this it might work great!

I did mini blinds split at the center of the doors so I could open the slider side and walk outside. Years ago I bought the 2 inch slats and I loved the look (very plantation looking) but they were very heavy to open. I wore out the cords and had to replace them. I now have 1 inch privacy blinds but I feel like the are not as "open" as the 2 inch. My view feels a little more restricted. I ordered them from American Blinds and wallpaper and they were the Hunter Douglas brand. I hope this helps.

i'd resist the patio cover! your patio is very shallow, will you really use it when it rains, and it seems that sun protection would be minimal. an umbrella would give you sun protection and then you could close it up.

Looks like a great space with a lot of potential for some nice window treatments. Horizontal blinds like that were never meant to go over a sliding door for the same reasons you don't like them. Hunter Douglas offers various lines of window coverings that come in both a horizontal and vertical version so you could match same fabric/colors but different orientations for the window vs. the door. I would recommend check out Designer Roller Shades & Skyline Gliding Panels or Duette Honeycomb Shades with Vertiglide.