A:Answer rbay,
Thank you for your inquiry!
First, as to the system being quiet, that is a subjective decision, which depends on multiple factors, including other ambient noise in the environment, individual hearing acuity/sensitivity, etc. What one person finds quiet, another may find noisy.
That being said, our configurations do tend towards the quieter side in general.
Second, yes, you can install Steam on the system to access and utilize the Steam store.
Thank you again, and if you have any additional questions, regarding this or any of our offerings here at Best Buy, please feel free to contact our Support Team, toll-free, at 855.490.2569; they will be happy to answer any questions!