I have always focused quite a lot on the break. I have tried many cues. Here is what I think:
Predator BK (original one): I am not a fan of a layered tip for breaking. I put a black Water Buffalo tip on. Night and day difference. This cue with this tip gives great power and control. Not the hardest hitting, but a very good break cue overall. My only major complaint is the workmanship is so so at best (compared to a higher quality custom cue). Also, the look is pretty generic.
Omen Jump/Break: I LOVE this cue. I have one with a cocobolo handle and birdseye maple forearm (the butt is only two pieces). I originally got it with Omen's phenolic tip-not sure what it is, but it looks like a leather tip on a regular ferrule. I think as phenolic tipped cues go, this thing has phenomenal control. Hit is very solid, and the overall feel and balance of the cue is excellent. Also, Pete Ohman is a great guy and excellent with customer service. This cue gets a big thumbs up from me. I later got a 2nd shaft with a Water Buffalo leather tip. This is also an excellent setup. More cue ball control than the phenolic, and only a little less speed. For someone like me who hits the balls pretty hard usually (22-26 mph), I am kind of stupid for using a phenolic tipped cue-there is really no need. Still, it sure feels good to smash the cueball with a phenolic tip.
X Breaker (gen 3 made by Samsara): I also love this cue. This is my main breaker right now. This cue hits harder than anything I have ever felt. Cueball control is very good, power is crazy. I really like the piloted joint-it offers a real one piece feel. Workmanship is outstanding. My only gripe is that the tip has a tendency to leave white marks on the table, which room owners don't like so much. I saw one of Richards cues that he made himself (not Samsara). It seemed identical, though without hitting balls with it it is impossible to know. Richard is a great guy as well and was a great pleasure to deal with.
Overall, I think my performance with the Omen cue is best for really smashing the balls. If you favor a more controlled, mid speed break-the X Breaker has no equal. Also, on a bar table, the X Breaker is the best thing ever.