I think either a 24 or a 32 man server would be best. The 32 man server would populate on its own if it has the right maps, but a 24 man one we would have to work a bit to get it populated. Anything less than 24 I think would be too small because no one would want to join (well I wouldn't). Whatever space server we go for to make it popular it needs to be fun; the only servers in my favourites list are the ones that I had fun on. And if we make are servers fun then people will want to find out more about us and might even join.