Hi!
I was at the same stage 2 years back when i bought my first digital PnS camera.
I personally suggest getting a Sony or Canon. Why? Sony uses Carl Zeiss lenses for their PnS which are actually high quality lenses. The lenses produces accurate and vibrant colours. FYI, CS lenses are used in Hasselblad cameras (very high end cameras) which are used by pros to take poster sized advertisements. Sony may be pricey but sony has good reputation.
Canon for its overall build and quality, i prefer its A series which requires AA batteries. AA batteries are good in a way that you don't have to worry about battery going flat, just bring more rechargables!!!
Panasonic uses the famous Leica lenses but their sensors are noisy...they have good specs but the noise is rather a put-off for me.
The rest I haven't really went to do in depth research so I won't comment.
The above comments are my personal opinion which are said based on my own experiences.
By the way, i got myself the Sony W5 which I'm still using and very happy with!