I've collected quite a few jump/break. break, and jump cues over the years.
There are so many good ones out there, it comes down to cost, the tip, hype, whatever.
If you are just looking for a break cue that is considered to be the best from a custom standpoint, I would say Steve Lomax.
Unfortunately I sold my Lomax un-hit because a friend really wanted it, and I kept the matching jump cue which is still un-hit.
I always liked the original Stingers by Jerico, Terry McFadden builds a terrific j/b for a very reasonable price, and I am currently using an Ernie Martinez jump/break.
For the dough, you can't go wrong with the J&J imports, or something similar.
There are several out of China that have proven to be quite good, and some have lasted for years.