If you go to:
http://www.seattlesymphony.org/symph...scography.aspx
It gives you a list of the recordings which the Seattle Symphony have made. Unlike many bands, it not common for orchestras to write their own music. They usually perform music written by
composers a long time ago (sometimes they do perform new music which has been written specifically for them by a composer, but this is less common). In some respects, orchestras are a lot like
cover bands...
ANYWAY, I'd recommend you look at the link I've given above and make a note of the names in the
composer column. This will give you an idea of the composers you might want to look for music by.
Looking at the size of the list, it might not be a bad idea just to get some more music recorded by the Seattle Symphony, as this might help you to identify which composer's pieces you like the most.