Hi Gavin,
Yes mate, there are a handful of diveozians that tread the waters of wetpixel also. As for the battery issues of using a sola 600, the main reason i went with the 1200's was the extra battery life of the brighter light.
I only use my sola 1200's for macro shooting as i have another set for wide angle work (i have both a macro lens & wide angle lense so i know what i am shooting), so i only use the 1200's on the lowest power setting but that gives me something like 4 or 5 hours of battery life. That way i could shoot macro all day long & not have to recharge until the night time.
Plus the size is another bonus, these things are so small & compact. They would be great for travelling due to there size & weight & i won't have to carry a heap of spare batteries.
If you ever come to sydney i am happy to loan you my lights if you want to have a play with them.
Otherwise, give Pete Mooney a call. I bought my lights through him & he was the one that pointed out the extended battery life that i didn't think of.
Cheers Pete.