So you have Reason, you have the Factory Soundbank and the Orchestra Refill that came with your new installation of Reason. Did you know that you can extend your Library with even more soundbanks with Refills?
There are so many sites that offer Refills, but a good place to start is the Propellerheads. Swing over to the Refills directory and browse through the vast collection of refills available to you.
Most are free, but there are also many commercial ones that, depending on what music you are producing, are worth the investment.