All the cards I posted support dual monitors. If you ever have extra money, it is def. worth it. I have quad monitors and am considering a fifth.
4550 will handle everything for quite a long time. Definitely a good card. And you can play little call of duty in your free time.
and its passive, so total silence. Being an audio engineer, you should consider a passive HS for the CPU, and some ultra low RPM case fans.