nanowrimo_lj | Plot Help . . . sort of.

I thought I had it figured out exactly what I was going to do next month. Now I have two ideas:

1.) A werewolf story. (Go figure). Twin werewolves, in fact.

2.) The second story involves witches, magic, and magical creatures.

I don't want to go too much into either one of them just now and I know that November is just under a month away but how am i supposed to choose now? I've had the idea for the second one for a while now and I'm thinking this might be the time to do it. The first one is a story started two months ago. I didn't getting very far and I'm going to start over on it. I need to choose. I need some help.

Help?