NEX-5n colors seem better than the earlier models. Its a good thing, but to me it also can mean that the Sony has no fixed standards at the moment when it comes to keeping to a color fidelity (even if this is only an internal spec).
(ie. they can tweak color o/p every model as they please)
I await further samples from DPR and IR to see if the color improvement is true.
NEX7 does seem to be the one to watch.
The unfortunate thing about NEX are the lenses. They are not small. The new ones that are on the road map are not small either.
No cheap, fast, small lenses (<f2.8) like the 14/2.5 and 20/1.7 at the moment and immediate future.
You'd have to pay for the high end Zeiss if you a bit small and fast and that is only one lens.
This seems to be their lens strategy across DSLR as well as NEX series.
MF is the way to go for NEX with the peaking focus, as many have found and chosen for their other brand lenses.
For me, I wait out to see if cheap small primes become avaliable before making any decision (maybe 2 years).
I know I don't need good ISO performance above 6400. In other words, current NEX-5n performance will suffice, so wait for the price to drop till its dirt cheap.
In the meantime, I just play with my K5 and GF1.
Samsung does seem to 'have it right' when if comes to smaller lenses for APS-C mirrorless.
Its a significant difference.
You can compare samples here :
http://www.imaging-resource.com/IMCOMP/COMPS01.HTM
You can also check out DPR.
Better dynamic range from the APS-C sensors too.
That translates to better highlight/shadow correction in PP.
On the other hand though, for the same DOF, the APS-C camera has to stop down more, therefore ISO needs to increase accordingly.