Best/Most Stable Nightly

I recently filed a few bugs, and to try-out a nightly, which, unfortunately, didn’t work. I figured that it might be a good time to upgrade, but don’t know where to start. So, basically,

Which nightly would you recommend for an end-user? Which has many of the new features, yet is pretty stable, and mostly bug free. I would very much like a version that is likely to stay compatible with future programs and features, as I am using Haiku as a working system. Which GCC version should I use, and what are the advantages of each?

Any help much appreciated!

Thanks. :>