Unsurprisingly, the Fujifilm X-E1's noise profile and image processing look very much like the X-M1's. In this case, it's really clean up through and including ISO 1600 in good light, with just a hair of detail degradation starting to appear at ISO 1600.
ISO 3200 still looks pretty good, although there's a jump in noise between ISO 1600 and ISO 3200. ISO 6400 is still usable in good light, but you can see how much detail is lost in the text under the currency and on it.
Shooting raw at higher ISO sensitivities can buy you just a little more sharpness, but only if you're willing to accept some grain. Compared with typical Bayer-array sensors, the X-Trans sensor's images require less traditional color noise reduction, but are less sensitive to luminance noise reduction. (Crop from preview image.)
Fujifilm's default Provia setting boosts contrast and saturation, but not egregiously. The Pro Negative Standard profile is the closest thing I could find to neutral that wasn't overly soft (like Astia).
(1/400 sec, f4, ISO 200, multi metering, AWB, 18-55mm lens at 50.5mm)