I am currently in Pastoria city and have not yet taken on Crasher Wake. My team is:

Luxray Lv. 30
Gastradon Lv. 30
Vespiquen Lv. 30
Staravia Lv.30
Torterra Lv. 32
?????????

For the last spot I really like both the new poison/dark types: Skuntank and Drapion. I am having a really hard time deciding which one to take.
Any suggestions?