I got accepted to both BU and UCLA as well, and was at first very determined to go to BU. However I wanted to meet with both programs before making a final desicion so I set up meetings with admissions and the field education office at BU and with Lance at UCLA. After my meetings I had a completely different view of the two programs and I decided to go to with UCLA. The BU program seems great but I felt that UCLA was a much better fit with my expectations and interests. So you if you have the opportunity then take the time and spend the money on visiting both schools. Its definitely worth it. Graduate school is a huge investment and you will thank yourself later if you do everything you can now to make the best choice.
Good luck and maybe I will see you at UCLA this fall