We have quite a few commercial support subscribers using 2.0 in production for installs where this makes more sense: They need a specific feature, hardware support, etc, that is not there in 1.2.x.
If that is the case for you, it may be fine to start with 2.0. If you only need what is currently in 1.2.x, it's fine to start there. You can upgrade to 2.0 later with a simple firmware update.
2.0 is almost to RC stage, just a few more hurdles to get over.