ECC1 claims are simply false. His Lenovo x120e can barely handle Eclipse. It's no wonder the experience is worse than his '10K$ Mac setup' ...

I've developed native apps for BB10. The tooling is decent. It's a bit heavy since it's based on Eclipse but I had no problems with it. You can also use QtCreator with BlackBerry 10, but I've never tried it. You will mostly use Qt-based APIs anyway in your app, so there's no issue with support. The documentation for BB10 Cascades APIs is very good. There are also lots of official and community submitted samples on Github. For questions I've always used their developer forums which were active.