Chicago Market: Which neighborhoods are considered class A, B, C?

[LaRon Phillips]

Hey BP'ers!  

I live here in Chicago (South Loop) and in doing my due diligence learning about real estate investing I've read the opinions regarding the pros and cons of the various neighborhood classes (A, B, C, D).  I think I have a pretty good understanding of how each class represents different investment profiles and I'm interested in the Class A & B neighborhoods.  However,  I'm having some difficulty conceptualizing what neighborhoods those are here in Chicago. I'm sure that in general, properties in the Loop are probably class A and Englewood is class D as they are essentially polar opposites but with our city being one of so many 'hoods there's a lot of variation in the middle...and I'm feeling a bit stuck! lol.  

I know the grading of the neighborhoods isn't an exact science but I'm trying to get some examples of "gold standards" in each class to help me focus my efforts and develop a better understanding of the nuances of my target areas.  

Thanks in advance for any insights and I hope everyone is having a great weekend!