Weeell... I would not recommend BESM 2E. It has some interesting principles and I quite like the Body/Mind/Soul stat system - but it's horribly, horribly unbalanced, and shortsightedly takes the stance that the lack of mechanical solidity will be compensated for by the players being sensible. Oops. Seriously, do
not play this game with a min/maxer who's even vaguely good. Talen's first BESM character had a gun which could blow up the moon with one shot. Even my BESM character (and I'm
not a good min/maxer!) had a retardedly overpowered weapon attack which made him at least five or six times more dangerous than the primary fighters in the group.
Plus, it lets you buy combat skills with the same resource as non-combat skills. I have never seen a system where that was a good idea.
d20 BESM I am dubious about. What I really liked about BESM by comparison to d20 was that BESM was classless. In the d20 version, they took away precisely what I thought was the best aspect of the system :\
Perhaps a better idea would be to combine systems - for example, using the d20Modern basic classes with point-buy BESM abilities sounds rather attractive to me. Provided the abilities are balanced, of course.
A friend and I have been working on a better ("better" by our obviously objective standards
) anime-flavoured d20 system embracing the classless ideal. It's currently at the "playtestable" stage, though it's in a state of flux because I'm arguing with the other head designer about what direction we should take it in (he wants to stick as close as possible to the D&D/d20Modern type of system, I want to branch out and make more variations).
I'm currently worrying that it doesn't fall under OGL because it includes rules for points-based character generation, which
seems to not be permissable under OGL...