If this helps...
Depends on what you want, I have a 20VT and therefore I bought the Miltek so my girlfriend wouldnt notice the upgrade - worked for about 2 weeks...
Empi5 got the blueflame and loves it, but he's got a Cupra R 225 so its horses for courses and how much you want to pay.
I had the 200 CELL CAT and downpipe with mine and its amazing, pea shooters or not, I wouldnt be so arrogant to try and persauade you either way. Do some searches on the site and ask people if they are happy with their choice, I think most wil be with what they have.
Either Miltek, BlueFlame or SuperSprint there all favourable exhausts on the site so your not going to go far wrong by choosing one of them.
Do your own research, ask around and go for what your budget dictates, like I said there all good exhausts either way.