there is a lot to consider when deciding on a break cue or whether to even get one at all.
What games are you playing? If you want to focus on 14.1 or 1p, you don't need a dedicated breaker.
For 9 & 10b a dedicated breaker is not a bad idea since it can preserve your playing cue and the right breaker can certainly enhance your game.
Deciding which to choose is a very subjective decision; what I like might not feel as good to the next guy so keep this in mind.
There is also going to be the noticeable difference between different break tips; another subjective matter.
With all that said, with the many threads that have come up here about break tips say in the last 5 years or so, the 2 tips that seem to be at the top of recommendations are the white diamond (phenolic) and the samsara (leather).
I have had both of these tips and in my subjective opinion, they are both superb. Generally, and most people will agree, the phenolic white diamond has a slight edge on explosiveness where the samsara has a slight edge on control. Both tips jump beautifully (if you plan to use your breaker to jump) with the samsara, again, having a slight edge for control. This is how the reports have come in on these and the overall question on which tip to use.
As far as which break cue, this has been a little more 'all over the place' but I think the Predator BK cues still win out. If you look to what the pros are breaking with it will be Predator BK's, hands down but you have to consider what part of poss sponsorships play into those decisions.
I personally use a BK2 with a white diamond and love the setup. My only complaint is that the uniloc joint on this model cue is notorious for coming loose and so as part of my pre-breakshot-routine, I always give it a tighten to make sure and that eliminates any problem. I don't know if Predator addressed this issue with newer models. Worth noting is that I've had the very same white diamond tip on for over 5 years. I have Joe Blackburn rough it up for me once evry year or two when I attend SBE; that's the extent of maintenance needed.
There will be a lot more subjective recommendations to come, I'm sure.
I am aware of a friend who took a very inexpensive J&J breaker and installed a white diamond and couldn't be happier. So there is this less expensive option available that can do very nicely, as well.
The other end of the spectrum are the Alex Brick and Tony Lane dymondwood breakers which are very cool looking and work well, too. These are in the $500-$600 range.
GL
best,
brian kc