For antennas, you simply cannot go wrong with a hirshmann http://www.dabonwhee...car_aerial.html
I know its £100 for a poxy aerial, but its the tits
I got that initially but it looked odd when I installed it. So got the Kinetic 6001 instead, which looked more OEM size and rake wise.
If I still had my Mk2 GTi 16v, that Hirschmann would be on there in a flash.