Welcome to the ED30 club fella.
Enjoy it first for what it is and then if you want, get a tuner to work some magic on your car. Stage 1 should see you gaining somewhere around 15-20% increase in bhp, add a piston DV and better panel filter and that will help, and that just the start, sure you know all this, on GTI number 4.
As mentioned for your plaque (and/or build number) give VW Customer Services a ring on 0800 0833914 and if it has not been sent out already to a previous owner then VW will send it to you for free. If its still available you just need to send/email them a copy of your V5.