jim's ribs in rock island is probably your best bet.
chicken/ ribs/ beef ribs is basically it.
they used to be phenominal but as Jim got out his family does'nt do AS good of a job as him but they are still relaly really great....sometimes they are dry...
RJ Boars is also pretty good as well....but more commercialized but i'd say it better than famous daves.
Lonnie Rays is kind of in the ghetto in rock island but its really really good....ribs/wings/gyros/
those are right accross the river from davenport.
if you want any other restaurant recommendations pm me and i can helpyou out. i live in the quad cities