Another question, will Divinity 2 be based upon Beyond Divinity? Because i only played Divine Divinity so i don't want to miss out on anything for not playing Beyond.
AFAIK ED will be based on DD. BD was more of an aside than a direct continuation of the plot. Also, since Larian is presumably hoping to expand their sales, I doubt there will be anything critical requiring that either of the previous games have been played (though there will probably be references to various characters, places and events).