Good RPG's on xbox 360 and PC?

Hello. I'm an avid gamer and I really like RPGs, mainly the quest/dungeon types, like baldur's gate dark alliance, diablo 2, Vindictus, Elder Scrolls Oblivion and Fallout 3. I've been searching for a new RPG/MMORPG game to play but i can't find any! Does anyone have any ideas? I'm looking for any RPG/MMORPG game for the PC or xbox 360, new or old, expensive or cheap. Please help me and suggest any good RPG's you know of.