Great input! To be fair though, I don't have any local or even localish dealers for BD or Vision X so I can't see the lights in person. My brother in-laws and I chipped in on a pair of LP9's for my FIL sight unseen going off of BD's reputation and specs. They are truly amazing quality and the light out put is fantastic! Having said this, I've had quite a few cheap Chinese knockoffs installed on other vehicles and ATV's and have yet to have one fail even beating them to crap out in the bush, dunes, -45°C to +45°C (not as hot as 128°F though), blizzards, fully submerged, peppered by sand, rocks and salt. The powder coat is completely off of some of them, the lenses yellow within 2 to 3 years, the optics are nowhere near as good, they can't melt snow and ice off the lens on there own and color temperature really varies between diodes in the same light (evidence of low BIN LED's). But they all keep working (albeit at a much lower quality and light output) as do the BD lights.
I like to do as much research as possible based on others/my own experiences and gathering as much data and specs that I can. Especially when spending the amount of money that these high end lights cost.
Thanks for the warning about the a pillar lights shaking! I've never considered a pillar lights myself as I don't care for the look but I definitely didn't think about the mounts themselves not being sturdy enough to prevent shaking. Good to know!
Airflow is another great consideration. My climate is cold enough that I run a weather front for 7ish months out of the year so I don't worry about blocking my grill airflow. I also haven't had any change in temps with or without bumper mounted lights, but in a super hot climate it's definitely worth consideration.