the spoiler as I was quoted the other day is approx 3000 I think it was 2700 or so fitted. but they told me it comes with central locking and a light in it. So I would be guessing. say base of 40 plus 2 for the I pod etc, 3 for lid, 4 for leather I would be guessing around 48 to 49 would be retail but you should be able to get them down. My standards stereo is quiet fine goes loud enough and clear enough, definitely not some cheap crackly system. they have 6 inch in the door and 6 by 9 I believe behind the seats. but first thing I recommend doing once you get it, drive straight to the timber shop, buy 2 planks the right size. they will sit in the tub in the sets of cut outs. These will stop stuff sliding all the way forward or back, handy to do, I put stuff in the very back one, when I get home I don't need to crawl up the front etc it is still down the back.