Title says it all. My startup has collected so many users that it's getting to be just ridiculous. So, we bought a brand new server with really nice specs, and I'm debating what OS to use.
While I love OpenBSD, I'm more concerned with scalability than security, at this point.
As of right now, I'm going to use nginx over Apache, and probably use a 64-bit Ubuntu server.
What would you use?