I've made a bit of progress on the bag over the last few days. I decided to go with Lamb's Pride in Brite Blue for the next row of solid squares.
It's not exactly a color that's in the Manos, but I think it works well over all. I'm happy with the spring-like tone of it. I was a little concerned at first that the size might be a little too small, but now that I'm a few tiers up it seems quite generous. Of course I'll lose a lot when it's felted...but that's part of the fun (for me anyway), trying to figure out the "before" size and shape in order to get the "after" that I'm looking for. I still have to decide how tall to make it. I figured that when I got close to being done, I'd just know it. Sounds good on paper.