I wanted to try and make the wiring as clean as possible. The light bar's wires are encased in some pretty thick, flexible plastic shielding. I drilled a hole in the plastic channel on the driver's side that hides the roof rack mounting points. I then did the best that I could to line that up inside the cab so that the vertical hole I had to drill would be hidden under that plastic cap on the roof. Worked out like a champ. I then ran the shielded cable through and poly'ed both holes, then ran it down the a-pillar and to the dash. I have a power distribution block in the cab, so I didn't have to route anything through the firewall.
As for the BXT II, I'm very glad I did that. After I installed it, I re-positioned the OEM insulation and used spray adhesive to secure it to the BXT II. The end result is a much more crisp bass response, and a lot less of a "tinny" sound. It packs a lot more punch.