Fitted this the other day after reviewing a few posts on exhausts on here. A Delkevic DL10. I paid extra for the black as I think it sits perfectly with the black of the bike.
I wanted a nice sound without being overly obtrusive and after a couple of rides it seems to be just right.
Thinking my next mod will be quite humdrum, just some tank pads as I want more purchase when I'm trying to brace against the tank (battery). I like the Wunderlich ones Nippy Norman offer but... £47