Haven't reached Kuroko through the index series but through the railgun series, I doubt Wendee Lee can keep up with Kuroko's voice.
Britney Karbowski and Laura Bailey on the other hand, I've heard enough from both to say they might do very well with
Kuroko.
While Kate Higgins works wonders for
Index, maybe an accent would work wonders as well. Someone like
Karen Strausman as an alternate.
Michelle Ruff has toned down her pitch lately, which could make her a perfect candidate for
Kaori if not,
komoe.
Already know about Bosch for
Accelerator, although I wouldn't leave out
Liam O'Brien as another candidate.
If funimation picked up this series here's why would I pick
Chris Patton and Luci Christian to be Touma and Misaka Mikoto:
I'll leave the others until I know more about them later on although I do have choices in prior posts.