Believe it or not
It should cost between 3000 and 4000 with parts.
Dont even take your X to the place that quoted you 1000.
Things are going to not work after a couple days, they wont fix the problems for weeks.
Thats like paying 500 for an engine swap.....not possible.
Good shops charge more because they do the installs properly.
BTW , all the speakers besides the tweeters in the front door require some custom install.
Go to a couple other places and get some more quotes.
You'll find them close to 3k


Oh ya
send your car to Will at unique and get shocked with a 5-10k bill