Sarah, so good to see you! It's been so long I had forgotten about your fab hair!! You look wonderful.
Now, on to business.
I like the fit of the Gap blazer from the side. And I suspect Meredith is right about the slight stiffness to start; the fabric will probably soften a bit.
And I hear you on the longing for a white (or at least a very light) topper. I love jackets for the same reason, and they are also very practical with air conditioning. To my eye, the white isn't horrible on you, but I wonder if a slight off-white (winter white?) would work better? I do occasionally wear true white myself, but I think I can look better in a winter white. However, if you've already been trying lighter jackets on and may already have exhausted possibilities. if this jacket's at a good price point, maybe it would be good to have it for now while you keep looking for your ideal piece?
LOVE the tops. They are gorgeous!! I think you look wonderful in each of them. My only caveat re the dolman sleeves is that will probably be for wearing without a jacket!
By the way, I think Kelly is right that Angie once wrote about whites. I am sure it's somewhere on the archives.