After reading the review in PCA, I bought the LG GSA-4163BA from PCW. They have them for sale at about £59......but you can purchase one at £39 from them in a plain brown box. This comes with a Ivory and Silver Bezel, but no cables or instructions. This is the one I bought, and it works OK.
I have the 4163B here it has only rejected 2 pieces of media in 3months both of which were RW's. It will write a movie disk in just under 10mins at 8x.
In PC Pro this month they have a round up of dvd writer and they review the 4165B which has support for -DL as well, they gave it 5/6 they said the write speeds were a bit slow and this is what stopped them recommending it. It costs £31 from scan.co.uk and comes with nero and cyberlink power producer gold and powerDVD