"Wow, I'm surprised the G series is whoopin up on T1-4!"
I almost voted for the G series. However, the D series takes the fun of the G series and adds the nasty pre-F'd up (Faeruined) Drow to the plot. It was tough picking D over G, but the Drow just were nastier and more fun to throw at my players than the less-organized giants. Besides, giants make the players expect a tough battle. The more brittle (in appearance) Drow allowed me to take advantage of guards being down. Ah, sweet memories... (even if the PCs DID prevail!)