Sounds like your happy with the cue you use, but the logic you present here doesn't sound very consistent. It sounds like you are saying that you can swing a lighter bat faster. This means you swing a heavier bat slower. This doesn't concern you with a stationary ball, and you make the analogy to a cueball. To follow your logic, you should be able to swing a lighter cue faster than a heavier one. Why would you want to swing your break cue more slowly? Remember that some of the most powerful breakers on earth are small guys (think Francisco Bustamante). He's probably exactly your size. I can guarantee you he does not use a 25 oz break cue. Faster cue=faster cueball. The only scenario in which the heavier cue might yield more "power" on the break is if you are a person who simply can't move their arm fast, even if your hand is empty. Let's say that is your maximum hand speed. You may not experience a big difference in hand speed by holding a cue, whether 18 or 25 oz. So for people with really slow swings (or people who are exceptionally strong), the heavy cue may offer more momentum when striking the cueball and result in a more powerful break. I think for the vast majority of people, however, the difference in weight from 18 to 25 oz is more than made up for by the difference in hand speed when equipping these two different weight cues. My fastest breaks are 27 mph, not the fastest, but pretty fast. I am not particularly strong. I use a break cue that weighs about 19.5 oz. There is not much difference if I drop the weight down to 18.5 or go up to maybe 20, but much heavier or lighter and my cueball speed goes down. Also, I find that the *effort* required to swing a heavy cue fast destroys any sort of control and smoothness in my stroke. It really is all about technique, not power. I don't want to use a cue that is too far outside my comfortable weight range to cause a breakdown in my technique.
My $0.02
KMRUNOUT