[Debaser]

Jaheira's is definitely more involved, overall...
if you have ToB, Aerie's romance can turn out pretty interesting (i just beat it with a human berskerker/cleric, and did the Aerie romance.)
If you do want to do Jaheira's make sure to keep her in your party from early on in the game, or else this can ruin the possibility of even instigating the romance...don't kick her out of your party, in other words.