I'm trying to transfer my organization's website from the university server to a separate machine on the network and need to know what the hardware needs will be. This will be a Linux server (you can recommend a distro if you like, too.). This is a fairly small website. Since I took over, the record maximum was about 21k requests in a week, typically around 16-18k. Everything is in PHP (will be using Apache), and uses a PostgreSQL database. Also, there will be 2-4 daily users using ssh/scp.
Thanks for your input.