@will34, please try to measure somehow the difference in throw between the XM-L2 U3 1A & XP-L V6 1A.
Any detail would be very interesting, as far as i know from here no one have tested & reported on that yet.
My guess is that the XP-L should throw better because it can be driven harder & with more amp & and therefore should throw longer.
I have just been debating this in the Zeusray thread check out near the end, it hope you can add some insight in to any possible differences between the two options.