I don't really care whether its a PVP or PVE server (although I suck at PVP), but it should be a low population server. I still have visions of the disaster from the crashes when I participated in the BRK event.

If we bring a couple of hundred toons, any servers "should" be able to handle it. but if we get a great turnout, and get five or six hundred or more (very possible if most of us show up with two to five toons), a low population server would be less likely to be brought to its knees.
I recall some decent lag the last time -- Archimonde is a medium pop server.

http://www.wemultibox.com/blogs/vynd...d-epic-success