I2S Input - Is It Better?

I've never used I2S on my DAC and CD transport, and until recently, didn't even understand what it was.
Just wondering if it's any better than AES or SPIDIF?  I am currently using the AES port for my CD player connection.  
Also, does the I2S just use a standard HDMI cable or do I need a fancier version to get the most from it?