Good ol’ text.
It looks nice, it’s easy to read, and there’s no confusion whatsoever.
The icons themselves don’t really add anything, except taking up space for the names of the stats, so they’re smaller and more difficult to read. And what sort of icons could the other stats have? Atk could be a sword… OK… Spd, a shoe or something? Int? Agi? End? I don’t even know what that last one is. But anyway, Str and Def are easier to come up with logical icons than the rest of the stats, which could cause confusion, and make it more difficult for the casual gamer to see which stat they’re looking at, without being forced to read the tiny text accompanying the icon.
And then there’s the issue of size. If you made “End” into an icon of the same size as “Str”, the “R” in Str would probably be touching the “E” in End, making it difficult to discern one from the other.
I just don’t think the Icons really add anything but potential confusion to the menu. The non-icon version of the menu looks awesome… sure, having icons would be “neat” (in that most games don’t do that), but is that worth compromising the ease of use of having letters that clearly spell out the stats, without having to interpret a simple icon or trying to read teeny-tiny letters next to an icon?