Those large pictures, I can't really read who drew them, but his art is really hit or miss for me. Either it's really, really cool as well as historically probable, or it seems a sort of Conan-charicature.
FrisianDude, most of them are by Christos Giannopoulos, if that helps. Any specific things you doubt the accuracy of? I am a bit skeptical towards the faceshield, but other than that, I think it looks fairly reasonable.
Oh I didn't mean to imply it was dodgy historical-wise, but more the pose and width of some of those fellows. Especially the Lakedaimon chieftain and the Egyptian epibates are built like brick ****houses and I think some parts of their gear are slightly exaggerated, perhaps. (The plumes on the chieftain, and that massive shield). Maybe simply due to the angle.