Hyperion also claims 4x (up to 5x) longer cycle life with the G3 packs. They are superbly matched packs, and use a new nano-manufacturing technique(although not 'truly' nano tech).... if that entices you at all.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens