Had the same issue, same two languages. Google Go still feels far from prime time, so I settled on Scala.

Got David Pollak's "Beginning Scala" book, Googled a lot and after several days of coding it clicked. Well worth the effort! The Web frameworks are not yet there (Lift is complex, Play is slow), but I learnt a lot.

I still keep my eye on Go, code most of the time C++/C++0x, some projects in Scala, and hope one day I can have all the benefits in one place.