Yeah, Mirrow, we get it. Thanks.
That said, the best guitar for fast playing is-- just kidding.
Really while Mirrow is right to an extent, most players prefer a low action. This makes not only fast playin easier, but just playing in general. Again, most players, not all.
For what you want to do, I think I'd be comfortable recomending a guitar with a double cut (Think: Gibson SG, Fender Stratocaster) as opposed to a single (think Gibson Lespaul). I have a Les Paul and it is more difficult to play higher up than the others (can't live without its tone, probaly should have gotten the Les Paul DC).
Again, this is for most players, a generlized statement, not for everyone. I'm sure theres maybe one player who finds it easier to play faster on a single cut.
Speed won't be about your guitar though. It's about you, practice the picking and the fretting. Master it on the guitar you have, and then get a scalloped neck (Kidding about the scalloped neck, not sure if it's good or not)