yep, thanks, i did that and theres plenty of info from cellman about building packs etc and he said the 15ah are actually 16ah, but nothing more recent about the 20ah cells like actual capacity over a good few cycles or discharge curves (even at low c rates).
i have faith, i really do (in the a123 goodness), but i cant help but observe the 70% + disappointment that i have generally seen in long term use of many types of cells over the years.
haveing said that i will lay the cash out again for these cells, and do some tests of my own soon, but surely there's a bit more info from people out there somewhere?