I just bought a DRIS Impact Video light (the 3C base, but you can get it with a Stubby more compact base) and compared to a few more $ lights plus the Archon in a dive shop (not sure which model but it was tiny).
The DRIS was substantially brighter and wider, but much heavier/bulkier and with a slight violet tinge that the Archon lacked. Compared to the $ lights, the Archon had a little of a flat/warm/grey color tinge that I'm having a hard time describing. Maybe it was just dimmer and that's why I perceived that.
You'll likely be fine on the Express. Have never had a problem being slightly over, and half the boat is divers. That said, it's been a few years since I did it last (tend to take boats out of Long Beach these days to hit the islands).
As I recall, the hand truck was a schlep but there were plenty of them. Golf cart seemed convenient as I was pulling a few hundred pounds in a cart in the hot sun, but probably good for my heart :-)
Enjoy, it's a beautiful location.
Check out the LAUE Ghost Fishing Project's footage of their cleanup of the Infidel if you want to see what it looks like at 150' just a (long) stone's throw from the casino at Avalon.