When you outgrew your server....

(I tried posting this in the bigboards forum, but never got a reply...)

When you outgrew your server, did you move to two dedicated servers (one for apache, one for mysql) or did you go for a better configuration (like RAID-10 which seems to be the favored RAID configuration over on vb.com)?

We've been on a Dual Xeon 2.8 GHz server now for almost 2 years. We have an average of 300 users online at a time, 7000 unique visitors a day, and we have a tracker on the site with about 9000 peers. Other stats: Threads: 30,054, Posts: 498,548, Members: 72,520 (we prune all members that are inactive for six months), Post per Day (avg): 600, Registrations per Day (avg): 180

Anyway, I think we are right at that point where we need to consider something more for our site. In November I added another hard drive to the server and moved the database onto it and that has helped for now. But, I'm looking into our next step and it seems that people either get a better configuration for their server (the RAID) or they move to two servers. So, I'm wondering what other sites have done as they got bigger and had to upgrade from your first dedicated server.