I had a Mk3 Golf VR6 and my dad has a Corrado. The corrado is MUCH faster! It's much lighter, and the space is a compromise. Corrado is more of a 2+2, Golf is a great every day car.
Definitely slip stream lorries if it's dry, but if you get stone chips, move put! Usual no air con, heating, radio, windows and sunroof shut and stick to 70mph. Remove any excess weight in the boot.
Archos - I got an Archos 80 (8 inches) for £120 and it's supposed to be the closest thing to an iPad in all aspects apart from the price. Get an Archos Titanium 100
The new nitromors is rubbish - the ingredient that made it as good as it once was, has since been removed, thus rendering it compeltely useless (unless you like green jelly stuck to your wheels) I've found something called Starchem Synstrip, which is much cheaper and contains all the banned DCM goodness! http://www.ebay.co.uk/itm/Starchem-5-Ltr-Paint-Stripper-Synstrip-/360772393549?pt=UK_Body_Shop_Supplies_Paint&hash=item53ffb5da4d "Makes Nitromors look like moisturiser" Also tells you to use in a well ventilated place with gloves and goggles. I likey.
For sale, fits Mk3 Golf. £80 for the stealth shelf with speakers, £80 for the CD/MP3/Radio. Seen the CD receiver going for £140-£170 online. Comes with connector for USB and iPhone connector. £140 if you want both.