Researching SIEM

I'm currently the Security Engineer focusing on our threat detection efforts. I come from a Splunk workshop, but we're currently using Google Chronicle. Google Chronicle lacks an online community. The documentation is vague and not as helpful and there's no training available for the product. I'm realizing that the product lacks a lot of the features that I have come accustomed to. What SIEMS are you using and what were the reasons you chose the SIEM?

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