I'm thinking of moving my trusty old AUL halogen to backup status and buying a new HID canister light. I've looked at just about every mfr. that makes them (Dive Rite, Halcyon, OMS, Sartek, Green Force, Pro-Watt, Salvo, Niterider and a few others I can't remember offhand). I've pretty much settled on Sartek; they have a switchable 21/13 watt with the switch on the handmount instead of the canister and with a lithium-ion battery for right around a thousand bucks (MSRP, still waiting for a price from a dealer that may be less). I was wondering if there were any Sartek owners out there who had opinions on the quality and workmanship of the heads and canisters. The canister, for instance has a screw-on cap instead of the latches I'm familiar with. As far as bang for the buck, it seems like you can get a lot more for your money from Sartek, or is this a case of "if it's too good to be true, it probably is"?