SD52 (the 2AA version) looks awesome.
Super: 300lm/1.5hours
Max: 220lm/1.9hours
Med2: 80lm/6.7hours <-- THIS ONE!!
Med1: 10lm/43hours
Low: 0.5lm/50days
Xyber says: "SD52 will be released in later Oct, SD5 will be the final one of SD series...Diameter is 33mm."