Thanks everybody. I'll decide between Ektar 100 and Portra 160VC. I usually don't shoot color negatives, so this will be the first for me.
My standard has been B&W = film, Color = digi. I just got a Nikkor 16-35 VR, so I'm very tempted to try it at the widest setting using full frame body so I can take the full advantage of the ultra-wide angle view. Wish me luck!