Which model do you have? Might be worth (if you haven't already) switching off the soundaktor and seeing if you like the sound as is. A res delete has been recommended many times on here and will be very cost effective.
Just seen on another of your posts that you have a MK7 manual? If that's the case, a CSS rear box for around £300 might be the way to go. Should be plenty of comparison clips on you tube to help you decide. The box is often on ebay from Latvia for a decent price, straight swap too.
