Trade-offs and Trade-Ins

So my life the past couple of weeks has relied upon Pros/Cons lists. Why stop now?

The new important decision is whether to teach Pre-K or Middle School. Here's the breakdown:

Pre-K
Pros:

• I would love my job, no doubt about it
  
• I have more experience with Pre-K
• No $ would be taken out of my paycheck for emergency certification
• Less grading, more free time
• I will probably get a job in Pre-K sooner than a job in middle school
• I won't have to take more Praxis exams
• I can send my kids to kindergarten as readers!
  
• Pre-K is a policy area that I am passionate about!!!
  

Cons:

• No degree from Penn (they do not have a Masters/certification for early childhood ed)
• Less rigorous?
  
• While I have more experience with Pre-K, I have never lead a pre-K classroom by myself.

Middle School
Pros:

• Closer to 5th grade (what I taught this summer)
• Degree from Penn
• I'm going to add this one because there has to be at least one more positive thing about me teaching middle school...

Cons:

• More grading, less free time
• $50.00 taken out of every paycheck for emergency certification
• More Praxis exams to take and pass (blegh)
• Not comfortable with content areas (I would only be teaching math or science)
• No guarantee that I would get science instead of math
• No idea when I'll get a job.
  

So clearly I am leaning toward Pre-K...the question becomes, how important is a degree from Penn? What are your thoughts?