First off, i would like to add that i have owned and or tried just about every freaking jump cue on the market... MOST, but not all.
And everytime i see someone asking a question about jump cues, i feel they leave out the key factor in the question...... IT DEPENDS ON HOW YOU JUMP.
There are 2 discernable methods to jumping, the standard elevated stroke method, and the "dart" method (some call it overhand, as if you were using a bridge).
You must first decide which method you prefer, or decide whether you want a cue that works well for both methods.
For standard elevated stroke me recommendations are:
J&J j/b
Xbreaker j/b
James Hanshew custom jumper
Lomax
Predator air (only for long shots)
Pechauer jump
lucasi jump cue L-2000 i think
lucasi air hog
For dart stroke:
Samsara jump
Jacoby jump
Predator air (only short)
X breaker j/b
James Hanshew
Chilton (the 2 shafter weird one LOL)
But... in closing, if you become proficient at jumping, you can use damn near anything that is front weighted, under 17oz and has a decently hard tip on it.
just my $.02