Maius Intra Qua Extra

Here we are on day 4 of NaNoWriMo, and my husband gives me an idea for a different, much better story to write! Why couldn't he have come up with this two weeks ago?!? I'm not sure if I should switch over.

Pros:

• It's a better idea.
  
• I'd be much more excited about writing it.
  
• The first two chapters of the current story are so boring I'm having trouble getting through them.
  

Cons:

• This story is complicated enough that I need to outline it before I start.
  
• It also requires quite a bit of research, so I probably can't start writing for another few days.
  

Sigh. What to do, what to do!