Logitech X-530 or Logitech X-540 any differences??

[General_Chris]

hey guys is there any difference between those speakers i want the most bass which i like bass cuz my creative sub is kinda ruined :P and iam saving up to get new speakers which you guys recommended??

[Brooksie]

X-540 has a control centre for volume etc and matrix button that turns stereo into 5.1 whereas the x-530 bass volume is on the subwoofer and the volume is on a speaker. annoying