Well they did bring out the XR3 in 2013 !
I have had some time riding both the XR2 and the GTS 2 15m and 11m for me the GTS 2 is better in waves with more bottom end than
The XR2 17m / 13.3m / 10m / 8m but in gusty winds and for more speed the XR2 is better
So it would depend on the conditions you ride in, which would be good for you
I haven’t had a go on the XR3
so I cannot comment on it yet.