Cactus Music
Depending on your computers specs and your audio interface there will be latency. There can be a lot on a sub standard system.
I have enough latency in my middle of the road system ( 7ms) that I find it better to monitor the actual digital drums brain while recording to Sonar. That way there is no latency at all in my headphones.
I second that ... get the latency down as much as possible, then try to see if you can live with it
monitoring thru the TD11 will be better (because of low latency) but then you can't "play" the expressiveness of the VST samples (and recording with one drum kit and playing back with the other just may not produce the right dynamics)
talking about dynamics: very important if you play thru the VST is to adjust the velocity curves to what fits the TD11 kit. some VSTs come with presets that give a good starting ground, but even those have to be tweaked. don't expect the VST to be as responsive to your playing as the TD11 (unless you to a lot of tuning) ... some features like positional sensing on snare drum are not supported at all ... that's why there is still a place for these dru modules in this world