Valencia in November or Gran Canaria in January?

Why do there have to be so many marathons I want to run?? How is a girl expected to choose between them all?

Gran Canaria

Valencia

After checking out flight and hotel costs to Valencia it seems to cost more than last year. I started looking at other marathons I could possibly run instead.

I found Firenze and Nice to Cannes but I'd have to send (and pay out for) a medical certificate for them.

I found San Sebastian but the flights out there are very expensive (and are with Iberia who I really don't trust not to be striking when I want to fly)

So then I thought instead of waiting until 2014 to run Gran Canaria marathon why not run it in 2013!!

That would then mean that I wouldn't be running Valencia marathon in November.

My pros for Valencia are:-
- I can try and get a new personal best on the same course
- I still have some museums there I want to visit
- I do love the city

My pros for Gran Canaria are:-
- It will count towards my 50 marathons in 50 cities goal
- I haven't been there before
- I know someone (Pancho) running it
- It's in January which means I'll be in the warm while the rest of Denmark is freezing
- The hotels seem to be cheaper there while the flights are around the same price as Valencia

I can't run both of them as I will still be running Barcelona in March 2013 so need some money for that too :-)

I don't suppose anyone in Valencia or Gran Canaria has (or knows of) a cheap room to rent for a few days? ;-)

So the question is which do I run: Valencia Marathon or Gran Canaria Marathon??
Any suggestions and help would be very much appreciated :-)