If you're just new to buying a Break, Jump or J/B, then the J/B combination cue is much better, as it will be less conjestion in your cue case, and not have the hassle of having to screw a 3rd cue together
As reguards which make/model toget, it would be best to try and go to a pool hall or a biliard supply store, and try a few J/B cues out (If Possible), I would recommend trying out J&J J/B cues, as they have a sood, solid hit, are easy to jump with, and are also very well priced and most of all, good value for money, without having to cough up a few hundred bucks on your first break cue
There are plenty of other makes and models of break cues and I guess that the only thing that you can do is shop around, but if it's your first break/jump cue, then J&J J/B is a very good place to start and then when you progress, then you can look around then for more technically advanced break/jump cues, but if you decide to upgrade, expect the price tag to upgrade as well
Either way, I hope that this is of some help or another and I wish you the very best of luck in finding a break cue that suits you best
Willie