Right then tit face. I hope this explains why 6x9's are shite for a good system
When the people setting up the speakers at a gig set them up they always have the speakers facing you.
They have them at the side of the stage, on the side of the stage and hanging above the stage!
AS you can see if you stand like this your ears are not recieving the sound waves.
This is due to the way your ears are formed. You have the open bit to collect the sound waves at the front and the rear is shielded meaning you cannot hear so well as there is soemthing blocking the direct sound waves entering the ear.
When you go to a concert you stand like this.
This means that your ears are receiving the sound waves directley to your ears.
What im getting at is that you are saying that 6x9's are good, but they are not aiming at you from the front meaning you are not recieving the waves direct to your ears.
The reason so many people say that the best thing to have is some good quality speakers up front and a sub woofer. This is so the sub can handle the low down bass and the speakers can handle the higher range stuff, which will be pointed directley at you. Like the gig situation.
Hope this helps