Hello,  
   I think that Eros.com has the best adds for Chicago providers. I am a newly independent provider (yay!) and plan to advertise on that site. I would never consider advertising on Backpage because it's associated with a cheaper clientele, and I believe that most ladies on there charge less and therefore (this is an inference not an exclusive statement) probably lesser quality.  
I am not yet reviewed as I am just getting up and running, but here's my website if you're interested:  
http://missmayavip.escortfiles.com/hom

Thanks for all the replies. Looks like I was looking in the right places. Already have the p411, date-check covered and rs2k.

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