My components say place tweeter high in door or even in the dash if possible.
Problem with that is that the sound from the tweeter hits your ear before the sound of the speaker with carries the Mid and Bass which is obviously further down at the door, so your catching delayed sounds from the latter. Ideally the sound should be coming at the same time into your ears hence placing the tweeter near the speaker.
Placing the tweeter in the dash provides a soundstage as it reflects off the windscreen opening up the highs of the tweeter
problem with that is you'd have to remount the speaker higher up the door.
Take a look at some professional installs at SQ competitions. Never mind the 23 speakers in one car with 18 subs Max Power stuff thats all for show!