I think the word lame is a great brandable but the .mobi extension kills it for me. xBag is memorable and pronouncable so it could have some value to someone but the fact that the .com is parked and probably available for purchase hurts its value a great deal.
The best of the bunch is HorrorFilmReviews.com. It has a clear purpose and is easy to remember. The name alone might get you low $xxx to the right end user. If you have an interest in horror films I would suggest you develop it with creative content and monetize it with ads.