Which USB adapter
 

So I'm looking at getting a usb adapter for christmas and I've done a little bit of research on them. These are the three I've gotten it down to, though I was looking for opinions on either/or and which I should get. They look almost identical and each have the same functions as the other.

Wiiki-tech virtual cd changer (approx $85)
http://i.ebayimg.com/t/Virtual-CD-Ch...Wcw~~60_12.JPG

or

XCarLink USB MP3 Player Kit ($125)
http://www.therpmstore.com/store/i/i...pg&lr=t&bw=250

or

GROM kit $130
http://www.gromaudio.com/images/grom-usb2.jpg

Thanks for the input.

http://www.google.com/url?sa=t&sourc...iqYHClgd7l6XsA

Looks OEM as hell and integrates with oem headunit and controls