Here are some things I want to buy. It's all reasonable prices and all from my favourite online shop ebuyer.
Asus 4x DVD DUAL /R/RW IDE BURNER - OEM (Pioneer DVR-106)
Price: £71.67 inc VAT
A 4X DVD writer with 11 5-star reviews
Maxtor MaXLine Plus II 250gb 7200rpm 8mb Cache IDE-Ultra/133 OEM
Price: £169.01 inc VAT
250Gb and 8MB cache as a secondary disk. I've already filled my 160Gb disk less 20Gb. 7 5-start reviews Worth noting that I can get Western Digital disk with same specs from Redstar.co.uk for £35 less.
Buying this DVD-writer might mean that I won't be able to burn CDs. But the purpose of getting a DVD-writer is to be able to make backups of films I download. I would also to throw out my existing DVD-reader/CD-RW.