SANS 555 (SIEM) or SANS 617 (wireless pen testing)

Thoughts on SANs 555 (SIEM course) vs SAN 617 (wireless pen testing)? Company is sponsoring the vast majority of the course - so either course is actually affordable.

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I am interested in sans 555 because I want to be able to find more suspicious items in my network.

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My interest in 617 is purely about tinkering with something that most people don't tinker with.

Thoughts?

cybersecurity pen pen testing sans siem testing wireless