JS_Harris - 11:38 am on Mar 16, 2009 (gmt 0)

I'd take a different approach.

Getting a dedicated server isn't the solution, it's the band-aid, and you're not going to want to move a bandwidth hog over there anyway. If you do and your business continues to grow you'll have the same ratio of bloat as you do now.

I would hire one or more extremely knowledgeable people to evaluate your current setup, perhaps only for your biggest site, and see how much you can optimize the code/database/template. You may still need a dedicated server but you'll be moving a lean and mean site onto it from the start.

With 2 million impressions a month i'm sure you realize that optimizing one image that gets repeated many times can turn into a HUGE savings in bandwith. There's a reason the user profile icons on webmasterworld are so small!