I give up

I pulled up at a traffic light the other day next to a diesel Range Rover V8 that had obviously had some work done and it sounded great, then pulled off like hell at the signal change. My question is has anyone done their headers/de-cat & free flow exhaust on their 320 Cdi? I never realized how great a diesel motor can sound and I am very interested in the power gains/ throttle response & turbo lag. I do know that there is an aftermarket ECU tune to eliminate/reduce the turbo lag which could work favourably with a great exhaust.