Those are rad, however this will be a build on a budget project for me.
So, I am looking at a donor bike build that get's me close to where I want to be at the start, then will fabricate from there.
Also, brute power isn't the desired end result in this case, lots of big bore low/mid end grunt is, which is why I like the XR/XL variants...
That and they are super user friendly from a service standpoint.
Sorry - I am more of a 6 day guy...