Looks like the auxiliary lights are the way to go for getting it dialed in for your lighting requirements. Also once you've got the switch and relay set up how you like it would be trivial to swap out lamps if you want different beam pattern or tint.
Cheap and easy and there's a huge market to choose from.
Good work!
edit: I did look around for headlights that might plug-n-play and I found some that might be able to work with some wiring harness modification, but they just don't seem...Trail-worthy.
There are a bunch of different sizes but they all seem so busy and the price is suspiciously low.
Here's one that's an example but probably wrong size.
It seems like a benefit of having the auxiliary lights lower is that they will light up any objects in the road from a different angle and perhaps give a more complete picture of the road ahead.
Would love to hear your impressions after tooling around at night.