NEX is the best choice (Dpreview). Plus new NEX-5n reviews.

DPReview (Click here) posted a mirrorless cameras roundup. And for each category you can see that NEX cameras are having the highest scores:
Highest score beginner mirroless camera: Sony NEX C3 (Price check: [shopcountry 7207])
Highest score intermediate camera: SONY NEX 5n (Price check: [shopcountry 8452])
Highest score advanced camera: SONY NEX 7 (Price check: [shopcountry 8454])

DigitalPhotographySchool (Click here) posted the full NEX-5n review: “Image quality is superbly sharp and fully colour saturated. But attaching the lens make the combo a largish proposition.
I was also a little startled to see the PDF manual erroneously claim the CMOS sensor carried 14.2 megapixels, when it actually has a 16.1 million pixel population. Makes a reviewer’s life tough!“.

The Sony NEX-5n and the [shoplink 8725 ebay]Voigtlander Nokton 35 1.4[/shoplink] by Terence Jones at Steve Huff (Click here).

Craig: “I was wondering if you’d be interested in viewing and possibly sharing a gallery of images shot with my Sony NEX 5N with a [shoplink 10786 ebay]Voigtlander Color-Skopar 21mm f/4[/shoplink] Pancake lens to help your readers ‘see’ what this wonderful camera and lens can do in ALL KINDS of situations. I’ve owned the camera and lens now for just under two months.
You can see the gallery on my website here:
http://craiglitten.com/p579867731#h396e7c43”

Metthew Belcher (Click here) posted a Zeiss 24mm DOF test made with the NEX-5n.

Sony NEX-5n test with M mount lenses at Spiegel.de (Click here).

The black Sony NEX-5 with 18-55mm kit lens sells for $499 only at Amazon (Click here). And I noticed that the camera is the most sold camera for a very long time now at Amazon (Click here to see the ranking).