[syslog-ng] Running two syslog-ng instances

Hello, I need to run two syslog-ng instances on a machine. I'm going to receive two heavy "streams" of events. The two syslog-ng's will have different configurations files. My question is: Assuming that just one syslog-ng isn't enough, this is the best way to do this? There is any drawback? Is a virtualized system (for example Xen on the same machine) a better option (isolating the syslog-ng instances and configurations)? Thank you, Pedro Simões