best side panel?

There isn't a "best side panel". It's all about personal preference. If you don't like the fan, take it off. Maybe you could put something else (metal, metal mesh, plexi, etc.) in its place and save the expense of a new panel.
 
I like ones with windows that aren't see through!

No but honestly, Biggest window possible with 2 92mm fans would be nice :p
 
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