+1 for HP 100's.
I have the Worthingtons, and they trim better, have more capacity (even if you only fill them to 3000psi -- although, I have *yet* to have any fill station short-fill due to 'wear and tear' or capacity issues). They're no taller (very slightly wider), than AL 80's, and while no heavier, never go positively buoyant. This means less lead on your waist, or in your BC pockets.
Someone mentioned the "neutral" AL 80's. Those are called C80's, and the reason they're neutral, is they're bottom weighted (thicker base), which plays games with your trim. They're also 3300psi, just to get you to 77cf.
The HP 100's are a bit more expensive, however, you'll make that up over the life, convenience, and resale of the tank...