Brink, Bulletstorm looks fun, but in the same way Gears of War did, and I'm sure it'll get stale fast. In Bulletstorm rather than hiding behind cover you're just kicking people with jackhammer boots and shooting them while they're in the air. It's fun for a bit, but you'd hope for more from it. Brink doesn't have any gimmick like that, and the way it's set up basically as a multiplayer game with the option to play through it in single player makes it have a much better replay value.