I don't have much of an opinion on pure break cues as I've never had one, but I sure do like my break/jump cue. It serves multiple purposes and I enjoy having it in the case.
I don't use it much (if at all) when playing on bar tables, but on the 8 and 9 footers, it helps me get a bit more power out of a nice, controlled stroke. I was also pleased to find that the cue I got jumps great as well... I've heard of many break/jump cues jumping poorly.
If you have a friend who has a break cue, ask them if you can try it out. You may be surprised at the difference in power you see in your break shot. If you like it, you will be able to do some research to find the cue of your liking from there. Then again, you may find that it's just not for you.
That's just my humble opinion.
Cheers,