Go on Ebay and find some decent used wheels and usually you'll get a good deal with the existing tyres. On my 2.0l, i had 4 motion 17"'s and i paid 100 quid with prety much new tyres on them. Sold mine which sound the same as yours also with half decent tyres but i got 125 for the 4 so i was 25 up :-)
You can get some RS8's on ebay for 300 used and just get em treated and powder coated for 60 notes. Alternatively, scour scrap yards as I once bought a set of venoms back in the day, a full set for a ton so you never know. Never buy them new, look out for the best deal but not so that you buy some sh!te. Just a matter of patience and a good eye :-) Let me know if you need any help pal :-)
