Michelle,
The thing about #2 that was throwing me was that the white button down seemed a bit business-ey to me.
I'm not sure how these would work with that tweed jacket, but here are some things at Nordies that I thought might give the outfit a less office, but still chanel look. The second and third one not so much Chanel but they caught my eye and might look nice with that jacket. and the fourth one is still white, but not button down.
http://shop.nordstrom.com/s/ke.....tback=1600
http://shop.nordstrom.com/s/ta.....9178-0-0-1
http://shop.nordstrom.com/s/se.....sultback=0
http://shop.nordstrom.com/s/se.....ltback=100
anyhow... for whatever it's worth.