Out of europe I adored Turkey, Italy vence and flourence, rome not so much, France (Paris) I could go on and on and on...
Depends also where you've been. Congratulations. That's a dream prize.
Funny I adore Rome, liked Venice, and was underwhelmed by Turkey and Florence - it's wonderful how different we all are.
I suppose it depends how long you have to plan. Problems with the volcano could go on for months (or just days) so Europe could be a problem but if you're planning on going next year it would be lovely.
Good luck with whatever you decide and make sure you get good insurance - my daughter says I worry too much - I'm sure you'll agree.
Have a wonderful trip wherever you decide on.