Blueflame for me. Baffle in it's nice and friendly but got a much nicer bassy note/fuller sound. Baffle out then it's pretty loud and gives a lovely bark when higher up the revs. Good quality, good price, looks smart, sounds great. I bought it direct from the blueflame website. It comes with the link pipe and all went together like a glove =)
http://www.youtube.com/watch?v=ipmAnwjKOdM#
http://www.youtube.com/watch?v=ipmAnwjKOdM#