If you want to be productive ASAP, and have done Java for ten years, I would suggest Java. Picking up new technologies is great, but even the most user-friendl

If you want to be productive ASAP, and have done Java for ten years, I would suggest Java. Picking up new technologies is great, but even the most user-friendly ones will have a learning curve. IMHO it's best to start with a new language/framework/etc as just a small, isolated chunk that takes advantage of its sweet spot.