Let’s spend a few graphs on Hans Graf. He is music director at the Houston Symphony, and guest conducting the SF Symphony this week, Thursday till Saturday. Now whatever you may say about Texas, consider that he earlier had the same job at the Iraq National Symphony Orchestra, and all of a sudden, Houston sounds much more, well, inviting (truth be told, it was in pre-Saddam Baghdad in 1975-76, when it was actually a nicer......