If you only play Rocksmith there aren't really any songs that require you to use a whammy bar for the notes to register, so the only reason to get one is if you want it. Personally I love mine purely for the sounds you can't get with a fixed bridge. It all depends what you want to get out of it. If you're going to block the bridge you'll probably find there's a fixed bridge model of the same guitar which is cheaper simply because of the bridge. If you do get one, you can get around retuning for standard tunings with a drop pedal, I know a few guys use these including Luke at www.twitch.tv/Wr4thTV. It drops the pitch of the signal in semitone intervals down to an octave. You would probably still want another guitar for drop tunings or those which are offset from A440 pitch. I've been playing long enough now that I've built up quite a collection and I still have one hardtail for odd tunings. Drop pedal is next on my wishlist.