I have bought both Febi and Meyle carriers and found the Meyle one to be a better fit and feel. The Febi only lasted 14 months, the Meyles have done 2 years and counting. Just my experience.

I bought the kit from P F Jones last autumn as I tow a caravan, easy to fit with the extra bits to wire in the pins required for fridge and caravan battery charching. Good prices and helpfull if you need to call them for any technical assistance.
P.S X5's a great towcar.