Is there a big difference in the sound quality, bass? The M2s design is better for me. If i buy them i will get it in package with 1 year warranty, and if i take CKS90 i will get just the earphones, without package, accessories or warranty, but they cost only 60$. I saw the feedbacks same seller have sell them for 95$.
And what about shipping, items from ebay arrives for max 30 days. What about mp4nation?
Please i need some advices quickly, i am going to buy one tomorrow. Thanks