X100 v D3s in Paris. What would you do?

I'm asking for intelligent opinions (no fanboys or flamers, please) regarding the X100 and landscape photography. I'm spending one month in Paris. I intend to photograph the city, to a substantial extent. I may go with night shots almost entirely.

My question is, X100 (light, small, doesn't attract attention, potential for great IQ) versus D3s w/proper glass (heavy, large, attracts attention, unquestionable IQ and flexibility). I own both and prefer to go with what's convenient but I don't want to sacrifice too much in the output as the effort will be substantial. I have a love/hate relationship with the X100 and don't feel it's appropriate to photograph anything that moves, but for my specific intended purpose it may be perfect. I know what I'll get with the D3s and I know the only regret will be size and weight - but that is not a small sacrifice.

This could be a once-in-a-lifetime opportunity. What would you do?

Steven