That's correct, the magnet's on the 6" JL audio's i got where a bit too big, you can just cut away from the back of the plastic surrounding which holds the speaker's in place.
ive got 10" in my doors.. it all depends how much you want to spend.. i dont think you can fit much more then 10" in the doors.
are the vx speaker pods the same as the vy ones cause i got a spear vx one i could muck around with first