"If I was going to be sitting out strong winds on exposed plains without any wind break, ..."
I bought a new tent for the CDT, driven initially by the same concern, but ultimately I compromised to find an overall good tent to sleep in in general, and went with a Lightheart Solo. I forget who it was on BPL who said at some point that any lightweight 3-season tent is going to handle wind only to some degree, i.e., if you're really really concerned about wind, get a four season tent and eat the weight penalty, else recognize that you have to take more care with any 3-season tent.
In any event, I'm glad I went with the Lightheart Solo, and in fact, you might consider their Duo model. It certainly is windy on the CDT (!), but in fact it was quite rare that it was really, just fiercely windy where I was actually sleeping. You're doing a lot of miles, you can generally find somewhere to sleep where it's not howling, big-bad-wolf huffing and puffing and blowing you down type of wind.
So bottom line is I would pick a light 3-season tent that handles wind above-average for a 3-season tent, but make sure that you get something you're comfortable spending time in in general too.
And I would make sure that your tent is really well seam sealed. Some pretty intense rain there at times, and I found that I had a small seam sealing gap that only showed up under intense rain.
Best of luck! It's a hell of a trail. You going NOBO or SOBO? Keeping a journal?