While it is far from complete and I think the rest of the SoundStage sites are often of questionable value,
this site has extensive measurement results done at the NRC facility in Ottawa, Canada of many popular speakers. No subjective commentary, just graphs. Being a measurements-tell-it-all kinda guy I think it's worth a look. The decidedly wobbly graphs of some well-regarded speakers are eye-opening. (You Thiel fans will note with pleasure that they have nearly ruler-flat response.)