They all look pretty good.
I do have one piece of advice for you. When i bought my speakers (similar to the x-530s) i didn't think about headphones/microphone jacks. The headphone jack is included in my middle speaker along with the volume controls and a couple of other knobs. when i want to use my headphones with microphone then i have to plug the microphone into the back of the computer and the headphone part into the middle speaker.
Bottom line here: get some speakers that have both microphone and headphone jacks included with the speaker that has the controls.
(i hope thats not too confusing.)