Help me choose...

I am a chronic reroller and I need some help choosing a class that I'm going to bring through the entire BG series. I've pretty much narrowed it down to an assassin->mage or a dragon disciple. The assassin wouldn't dual until BG2.

So, I'm looking for some input from you all. Which do you think is going to offer the best experience through the series.

My BG party will most likely be Dorn, Yeslick, Rasaad, And Neera. The 6th would either be Baeloth (sp?) or Coran depending on my class.

Thanks!