Planescape: Torment, if you did find it, might not work on your newer machine as you said you have some compatibility probs, but then maybe someone here has it and it runs on a new machine.
Ever seen Morrowind 3? Now there's a game you can get lost in, but I'm not sure if that's your taste. First Person view and huge open ended game.
I really enjoyed Temple of Elemental Evil, after it's patched I had no problems with it and it was for me the best turn based combat system I've played.
