I voted 2 since it was the one I felt had better characters, story and challenges. Irenicus was a once in a generation villain, unforgettable and there were many themes that made BG2 the best game I've played in quite a while such as kinship, rivalry and love to name a few.
That being said, I think the biggest impact will be felt by BGEE as it had a much more outdated look and feel to it.
I can't wait to see how the new characters look, I hope its not the crappy old paperdolls.
Those screenshots that will be released tomorrow will give us much more information.