2.1 or 5.1?

[bluehaze777]

I'm not sure if i should purchase http://www.overclockers.co.uk/showproduct.php?prodid=SP-092-CL&groupid=702&catid=22&subcat=173

or http://www.overclockers.co.uk/showproduct.php?prodid=SP-093-CL&groupid=702&catid=22&subcat=165

Is it worth buying the 5.1 if i'm only going to place all the speakers in front of me on my desk?

Will they work with the 360 vga cable?

And whats the difference between the OEM and Retail versions?

Thanks...