Servers and Hosting

Over the past six months we've really built out our server infrastructure. We now have systems in three data centers, in three dispersed geographic locations for redundancy. There are separate systems for blogs, testing and staging, five machines serving grazr code, feeds and GrazrScript processing and two new database servers. All that and we're looking to expand even more! Im continually amazed at how much compute you can get for the money these days.

So here's a general question out there, anyone know of a good dedicated server hosting provider? We're using two right now, but we're looking to build out on a third. Anyone have good experiences with a particular provider, especially in terms of reliability?