So, with the demise of TF2 as an official tournament, we can't lose at that anymore.
I think we should rule out picking up LoL because that will inevitably end in tears for us lot (although I think some of Dom's friends might be doing it).
BF4 on the other hand, has been added as a prize-winning tournament, and only needs a 5-man team. I think we've got more than enough people who play it, and it's definitely one of the 'core' 404 games. Plus I doubt it'll have a high amount of eSports or high-level players, as they'll all be doing SC/LoL/CS (as you can only enter one tournament), so we'd have a fair chance of placing somewhat high.
I've created a squad on the Tournament Sign-Up page.
If you'd be up for giving it a shot, please register yourself. We can have as many people in the squad as we want. If we get enough, we can do a bit of practice in the run up, work out roles, and then hopefully have some fun.