We have a winner! I've decided to go with the Fyne vest and join in with the Vest-uary festivities on Ravelry.
Getting past the ribbing was tough, because it was hard to feel like I was getting anywhere with it. However, yesterday I only had to go in to work for three hours, and I devoted a solid portion of the rest of the day to knitting. Although I don't particularly want to devote every waking moment to the vest between now and March 1, it now seems possible to finish in a month (as per the loosey goosey Vest-uary "rules").
I took a break from the actual vest knitting this morning to lengthen my swatch and reevaluate colors. I've decided to replace the dark forest green in the largest motif with a dark blue color of Felted Tweed I have in my stash, and switch the order of the light blue and purple so that the purple is furthest away from the center. I've probably mentioned before how I'm a bit of a chicken when it comes to changing design colors, so this decision was a Very Big Deal. I had to take a break and talk it over with Mo before I decided to go ahead with the substitution. Having that swatch ready to embroider over in the various colors was a lifesaver--I would hate to knit dozens of 200+ stitch rounds only to decide it didn't look quite how I had expected.
Every time I finish a round I think about how grateful I am that I don't have to start purling. Yay steeks!