Hello balduin, I'm sorry but I don't have much time these days...I'm working full time and my week ends are mostly spent outside (this saturday being an exception!) What I can say though, is that I've never given up on anything yet, so I will most likely dig deeper into the Anuradhapura kingdom history, when I'll have time.
I agree with you, for a civ to be of interest, you need more materials, more distinctive features. That's what I'm looking for, features that would distinguish sinhalese ancient kingdom from the mauryas in terms of military : units, tactics, etc. Unfortunateley, I haven't found that yet...