Now that's what I call a refresher, er. . .flashback! I remember walking/wadding in the middle of Kaneohe Bay since there was a sandbank or something there where you can walk around in waist deep water. Have to get there by boat though. Water was really warm, like taking a very warm bath.
I think the HF HID and the Acro/MC X990 are roughly the same Lumen output of, what? . . .+3200 or somewhere abouts? I'm sure you're aware of the GB from SUVLights.Com has on the later HIDs. The kit comes with two (2) rechargeable batteries for $300.00. Don't know what this year's pricing will be though.