I like this couple-run studio in Encinitas.  Very spiritual, mindful practice of yoga.  I think the prenatal (Serenity) classes are very good and very supportive and personalized--a great energy in those classes.  The regular classes are good too, but I find most not to be rigorous enough.   It's a good blend of mind and body.  What might not work for some people is that there is usually a lot of wisdom and thoughts imparted all through class--if you find a lot of talking to be a distraction from your focus (which I do, to a certain degree), then these might not be the classes for you.   The chanting sessions are great.  
                        
more