Dragon Age is superior to both BG2 and NWN1 in every single way. First it gets away from the lame DnD rules of 2e and 3e. The voice acting is top notch, superior to Mass Effect in that regard. It also has a great musical score and story to boot. The Baldur's Gate series pales in comparison. NWN1 isn't even a spec on Morrigan's nipple.