Is it worth getting a Galaxy Nexus at this stage?

I have a Samsung Omnia 7 which works well, but the lack of apps is somewhat frustrating. Or maybe I'm just a little ADD and want something new every 9-12 months to play with. Anyway I'm thinking of selling the Omnia (for around 150) and getting a second hand Nexus (around 300).

Do you think it's worthwhile to get the Nexus at this stage, or is the battery life/oldness an issue?

I like the idea of being able to custom ROM it and update it whenever I want, but I don't particularly dislike WP7 - I really love the Metro UI.