Thanks for the feedback guys. The reason that I want/need it quieter is that the other day my wife sat in the back sat with our little boy as we drove around and she said that it was way to loud in the back for the little guy. So I just want it quieter for him, not me, I love the sound.
Maybe I'll investigate the dynamat option, thanks Tarmac!
Otherwise I'll look at a Varex or quieter muffler
Cheers
Dom