Atlanta neighborhood classification question

[Anna Watkins]

I'm looking for some benchmarks for figuring out how different areas in intown and near OP Atlanta are classified (A, B, C, D areas).  I bought my personal residence 'across the tracks' in the City of Decatur 20 years ago (in the crack-house era), stay away from Buckhead as much as possible, and invest in Belvedere/East Lake, so my comfort-zone might be a bit skewed off average.  I can't figure out what's B, C, & D, or how to imagine those areas in other cities I might want to invest in.

So, how would you classify Oakhurst/Winnona Park? B? C+?  @Rick Baggenstoss -- what's Midway Woods now?  What was it 7 years ago? @Todd Whiddon -- how about the Northlake neighborhoods?

How is an area like Garden Hills or Peachtree Hills in Buckhead classified?  Are they A areas?  Is there even a classification concept for the MacChateaux on Riverside Drive, or Mt. Paran Rd?

What about Belvedere Park?  I'd live there in a minute, but I'm not everybody.  My plumber said he was nervous about the area, which made me really start to wonder!  Are we in C or D territory here?

And West End/Adair Park?  How about the areas west of GA Tech but south of the newly trendy Westside. It's so spotty now, but I still don't have a feel for how they compare to "war zones."

Any rules of thumb for figuring this out on my own?   Does it translate from city to city?  Thanks!!