So, I ended up getting a separate jacket...

http://www.llbean.com/llb/shop/68494...ry&feat=WEB-od (had a 20% off coupon code that pushed me over the edge)

and vest...

Amazon.com: Pearl Izumi Men's Elite Barrier Vest (True Red, X-Large): Sports & Outdoors

I think this was my best option. The jacket for my 11 mile commuting on the cold mornings. The vest for longer weekend rides when temperatures (body and weather) change over the course of many hours and adding and/or removing layers is more critical.

...and to get both for less than $100 is a bonus.

Thanks to everyone for all the advice.