Whatever works. I bought a Prulhiere cue when Brian was running a special for Christmas a few years back. I got the ebony with the fiddleback wrap. I originally bought it intending it to be a playing cue, but honestly I didn't like how it played at all. I was about to chalk it up to a loss, but then decided what the hell I'll hit a couple break shots with it. It's been my break cue ever since. This thing absolutely crushes the rack! I haven't even changed the tip since I got it, still the stock Triangle(?) it came with.
Just goes to show that you don't need to buy a specially made "break cue" to find an awesome break cue. As long as my Prulhiere is still alive, I won't be buying anything else.