Steve Huff (Click here) compared the Sony NEX-C3 and Olympus E-P3 jpeg quality. In Steve opinions Olympus colors are better than Sony.
And EosHD (Click here) compared the high ISO results of the new Sony NEX-5n against the E-P3. The NEX-5n is undoubtedly better. And also better than the Canon 5D markII.
Also Soundimagesplus (Click here) tested the E-P3 ISO results: “To be honest they are not as bad as I feared, though I can’t really think of much use for the ISO 12,800 setting.”
You can check the E-P3 price and availability by clicking those direct search links: Amazon, Olympus US store, Adorama, B&H, eBay.
Check the 12mm lens price at Amazon, Olympus US store, Adorama, B&H, eBay.