between disciples 2 and 3, which is the better purchase?
Which Disciples 3?
Dsiciples III Rennaisance and Disciples III Resurrection is quite different from Disciples 3 Reincarnation (mind the different number-system).
And about everybody loving D2 says D3 Reincarnation is the one to go for, because Renn and Res plays quite different, they say.
Better or not I cannot say. I haven't played any DIII/3 game yet but I love D2, so I am waiting for Reincarnation to go on sale. (though I am not a Stratetgy guy, basically only D1/2 and Crusader Kings 2).
But if in doubt and you don`t mind the older graphics, D2 Gold is a safe bet.