There was Icewind Dale 2 and the Neverwinter Nights games, all of which I think are well regarded, D&D rule-wise at least. Did they ever make any other 3e games?
I only ever put serious time in Neverwinter Nights; there were some times it didn't accurately adapt the pen and paper stuff, otherwise I had fun character crafting. The interface was pretty annoying though, Larian doesn't have anything on NWN. As far as adequately explaining the rules to you, that seems to be a serious shortcoming of any crpg, just talking about the Baldur's Gate games, I don't know half the things going on in a magic combat to this day, and the only reason I know about the other half is from knowing about D&D outside the game.
