The .info extension was built for exactly this kind of content: directories, guides, and reference resources. It quietly tells a visitor the site exists to inform rather than to sell, which is a useful signal in an industry where most sites are selling reports.
Market research media covers the trade publications, report resellers, analyst newsletters, and events that serve the research profession. A directory of them would be genuinely useful and doesn’t currently exist in any organised form. Who publishes what, who covers which sectors, which newsletters are worth the subscription.
The name fits a directory, a reference resource, a glossary and methodology guide, or a free-content arm for a commercial research business. That last model works well: informational content on a neutral extension attracts exactly the professional audience a research firm wants to reach.
Three plain words, exact phrase, no hyphen, and an extension whose stated purpose matches the content precisely.
The name is available. Offers welcome.