I recommend One Identity’s Syslog-ng™ Premium Edition because it is a mature product with proven success, has some of the best documentation, is continually being developed, and has a rich feature set.
Founded in 1982 and now distributing across 5 continents, Datapath has customers in more than 100 countries worldwide; covering multiple industries such as professional audio and video, military, education, security and health care. Syslog-ng Premium Edition helped DataPath by meeting HIPAA and PCI-DSS requirements in Windows environment.