That Manta light looks pretty darn good, but I would probably go with the Photo Torpedo as the ultimate backup. The Manta is smaller (probably somewhat good, but hardly essential), but the higher battery cost (and now you have to keep another kind in stock for spares) plus slightly higher light cost ($160 vs. $140, unless street prices are lower than msrp) are my main reasons. Plus the PT has an incredible track record with the technical crowd at this point. Not saying Manta is bad (extremely good, in fact) but I think there are more PTs that have been reported on at this point.
