Well if it's a 2.0 TDI with a double pipe then there is a seat crome sporty trim pipe but if you do get that do a deal with your dealer to get it fitted either free at service or for a reduced cost, don't do what I did of trying to fit it yourself else you loose your bargaining power over the dealer once you have bought it. Basically for the Seat crome trim you have to cut off a chunk of pipe and that needs ideally an exhaust pipe cutter which is a ratchet type of thing and it needs to go on ramps to do the job. If you try to do it yourself it's a very nasty job with a hacksaw and I'm too old for that and my brother was as well. Gave up on that. Someone in the past who posted did it themselves, but you need muscle and will power if you try to hack it off yourself.
Pass on the aeriel, to me the VW ones look much the same which I'm sure someone will tell you they all are, they seem to be common across a lot of manufactuers. There is the dumpy small one you can fit off a Civic ???, look in the 2004 posts for that one, I found it recently and it's been talked about in the last few months, that's where you garage the car and the swing up roof hits it. A guy in 2004 sorted that one out.