I wouldn't even be worried about latency tbh. It's not worth it. Your ears are good enough to know what sounds right when you shuffle around the sample delays on your main mix (main system based). We're mainly going to use this second system for testing Scope plugs we make, but also for sound generation from synths, samplers etc that'll be recorded on the main system. Using it that way, we'll have more of an issue with the latency of midi than with any audio latencies.
