I'm looking to upgrade the nose of my E39 540i. I want to get a M5 replica bumper and new headlights. There are a couple brands to choose from and I hear lots of different stuff about why I should or shouldn't choose one or another. Has anyone here done this to their E39 and can point me in the right direction? Also if you know anything about how much it would cost to have everything installed and what not that'd be great. Thanks for any help!