Which European Spring Marathon Should I Run???

Ok. I really must have this marathon bug thing!

I'm signed up for Berlin 2012 but that's so far away that I want to run a spring marathon as well :-)

I'm thinking about Madrid but would love to know what your favourites are and why? I will go for a few days and make a holiday out of it. I'd like to run a marathon where the crowds are 100% behind you as they were in Valencia :-)

Thanks for your help!!