If you haven't heard them yet, I HIGHLY recommend the Curtis Symphony.  I just heard them do the Firebird Suite and I have never heard it better played.  Unbelievable.  The beginning was almost inaudible. The audience so quiet you could hear a pin drop. Hard to believe you could get a section of basses playing so softly. The first loud chord was phenomenal. Nearly knocked me off my seat. You simply can't get that kind of dynamic range anywhere but a live performance.

Great deal also! The most expensive tickets were $30.