A4 Avant 1.8T Limited Edition

Evening all,

As a newbie to the forum, apologies in advance if any of these questions sound stupid.

My mrs has just bought a 2004 1.8T quattro avant as a family is on the way and I've got a couple of questions on it:

What exactly was limited edition about it ? (to me it looks like the body kit and the TT style wheels)
What tuning options would people suggest, it is the 163 BHP model and (admitidly only after a short test drive) it feels like it could do with a but more go - I'm thinking that a chip might be the best bet.

Any points to watch out for ? It has had the coil pack replaced by VAG already.

Cheers

John Boy