I agree with Rik, get yourself the BF full system and you'll save yourself a good few quid. Especially since Milltek don't make a down pipe so you'll end up paying loads more to get a full system.
if you do get one anytime soon beezasport, let me know. Then again if anyone in Leeds has a Bluefalme to compare to a Milltek I'd love to hear from you. I think Milltek will be the more appealing to the ear as they do advertise that the sound increase is minimal, which is what I'm after.