I finally got around to trying out a set of LED headlights in our 310.
Thankfully modern Semi's have the same size headlights so there are several very nice options available in different price ranges.
The ones I went with light up the road like the sun, an absolute day and night difference, not cheap, but made by JW Speaker which is right down the street from me, extremely high quality, and could not be easier to install.
We were on the road last spring with some time to kill so I stopped at the Big Rig Chrome Shop in Oshkosh WI and the guys there tested these out, they plugged in and worked out of the box or with slight modification as I remember.
We were in and out in less than an hour. I do not think I have done anything more easily to drastically increase the safety of the 310.
They offer a heated version as well if you run your rig in the winter, the low power consumption of the LED leads to Ice buildup on the lenses if they are not heated.
The only downfall I can come up with is that they are offensive to oncoming traffic if you do not aim the low beams or forget to turn off the high beams.
Sorry for the delay in posting, but hopefully someone can make use of the info down the road.