NEX 5N's IQ looks like joke afterwards
You are comparing your nex with the very best OOC JPG engine. The camera itself is a cheat though: actual ISO is about 2 times lower than nominal, lower resolution at base ISO than 5N:
These are D800E downsampled to 16Mp, Sony NEX-5n, Pentax K-01, Fuji XPro-1. First three are taken via RAW files, the fuji's one is OOC JPEG (best what we can get). As you can see, fuji is the worst. This behaviour is expected, because the resolution is function of all three channels, but we have worse red and blue channels (because we have less samplings of these colors with X-Trans) with about the same precision of green channel (due to inneficient green filters placement of XTrans).
The rumors about "excellent" fuji XTrans colors are urban legends: the colors basically depends on color profiles, not sensor in modern cameras.
So, you have to add: if you want to shoot exclusively in jpeg, it's good to consider fuji xe-1…
Unless you will have better results with e.g. 5N and DXO filmpack (VSCO film, etc) somewhere in post processing queue at least at base ISO of 5N.