In my experience the best way BY FAR to become an expert (certainly at such a complex system as SQL Server) is to be MENTORED by an expert. So I stand by my recommendation 100%. Your company would come out with an optimal environment and you would learn along the way. Win-win.

Oh, I did think of another thing, although it is reaching a bit: maybe try reseating the memory. I have experienced or heard about some very weird things happening with poorly-seated memory.