Show patience with BG 2. It really is as good as everyone said.
actually, buy baldurs gate, and the expansion pack, tales of the sword coast. you should be able to buy them together in a package called "the original saga." it's cheap but it's good.
bg2 follows the storyline created in bg1 and you can import your character from bg1 into bg2. get throne of bhaal instead.
i was gonna recommend you get planescape torment like i do to everyone else, but you said you like hack and slash rpg's and hack and slash is one thing PS:T is not...