Have to agree with the comments about single vs. multiple T6. My single TF T6 with 2 cells and ~50mm lens is plenty of light with long run time. I live in a very rural and fairly natural area as well; and find too much bounce from very strong spill interferes with night vision. Also found I quite like an aspheric which has almost none (Thanks TheShadow!).
If you aren’t sure about whether you want strong spill or a very tight beam, I’d suggest considering a very inexpensive flood to throw style light with an aspheric to experiment.
Still very inexpensive there is a thread on the different sipiks you can get (larger or smaller lens). Or I might look at Poppas versions for something only slightly more expensive.
Back to the single XMLs, I’d give serious look to the Crelant 7G5. It’s pricey, but the upgrade option of a 7G5 with huge collimator head is pretty awesome; very useful in areas where you can opt up the power to very long distances, so I am now going to watch prices on those.