For those who bought the Dell pc at the fantastic price of £329.07 http://www.hotukdeals.com/forums/showthread.php?t=65669&highlight=dell
(posted by Mike T) or need 7.1 speakers, these Creative Labs Inspire 7.1 speakers should do the job.
Amazon want about £70 for these speakers while Play want even more.
These speakers are so cheap because they are the non-creative boxed version (they comes in a basic cardboard box).
All the reviews for these speakers are good. I'll put a link to reviews in comments.
In case it is not obvious - these speakers are brand new!!!