Lestat.
MS is hard to notice for most of the time and in real gaming.
In normal gaming, when you shoot, run, "turn on" physics etc you're much more often CPU bottlenecked.
Even if you're not, you're probably for most of the time above 40 FPS, where you can't notice MS with your eyes, especialy that most off ppl feel smoothness pretty much diffferent and you can quite easy get used to MS effect.
Especialy if you use < 24" display you have high FPS and nice CPU bottleneck for most of the time with SLi/CF setup.
Conclusion is, most off ppl won't ever notice something like stuttering.