A good dvd rom is an lg 16x which you can pick up at currys or dixons a good writer is a liteon which are good if you use clone cd as it does sometihng to the safedisk protection anyway you can pick these up at this site
www.svp.co.uk.When building a pc you need to get reliable parts such as a geforce sparkle fx 5200 and a ultra dma hd if you needed help finding these part i can help