The Great Race Debate

I have no idea what my next marathon should be. Seriously. I'm aiming for something in the late November - March timeframe, but there are so many great marathons out there, so many places I want to visit, and so little time. I'm overwhelmed!! As I am not one of those people blessed with the ability to run multiple marathons in a year without injury issues, I have to pick my races wisely. So I'm throwing this out there, bloggie world: What race do I do next?? The Shamrock in Virginia Beach? The Cowtown 50K in Forth Worth? The Sun Trust National Marathon in DC? Seattle in November? Big Sur? One I haven't named? Help!!!!!!!!!!!!