I received an email 2 days ago from Line6 talking about the new XD-V55 that's now shipping.  There's also an intriguing article with Guy Coker, talking all about how this 4th Gen digital wireless is so awesome for guitarists and bassists. 

But it appears the XD-V55 is only for microphones.  If that is correct, what is the equivalent for guitarists?  It can't be the Relay G50 which has been shipping for well over a year, is it?

The G50 does have excellent reviews.  But if I'm going to buy a new Line6 wireless for my guitar, I'd like to purchase the latest and greatest. 

Thanks for straightening out my confusion.