[syslog-ng]Calibration of the syslog-ng server

Hi, I want to collect about 1500 hosts. I've estimated that it represents about 8 000 000 messages (1 Gb) daily. My syslog-ng server, which will be dedicated to this, will run on solaris 8. Have you got any idea about needed cpu number and memory ? Thanks for your answers. JM Loubet