Cardit,
I have not tried the vantage but the taper has me a bit wary. Honestly, almost every pro who uses a predator, plays with a 314-2/3. I like the way it hits and will probably stick with a 314 shaft on every cue I own for the foreseeable future. If you are used to a pro taper, the predator is going to be a lot more conducive to your game as well. Do you already play with an LD shaft?