New camera choice advice

After years of faithful service from my $150 Canon Power Shot A550, I have decided it is time to upgrade. I would actually love a DSLR like a D3 (just joking) or a D300S, but as I practice lightweight bushwalking I have considered DSLR’s to heavy.
After some research I have decided to get a compact camera with a changeable lens and I have been looking at these cameras in order of choice.
1: Leica M9, for quality this is by far my first choice but I have ruled this camera out as my wife has refused to let me take out a mortgage on our house.
http://cameras.teds.com.au/search?w=leica+m9
http://www.dpreview.com/news/0909/09090909leicam9.asp
2: Sony nex-5, I like this camera as it is the lightest of the four thirds with changeable lens camera.
http://www.teds.com.au/www/6/1001102/di ... 88338.html
http://www.dpreview.com/reviews/SonyNex5Nex3/
3: Panasonic Lumix Gf1:
http://cameras.teds.com.au/camera/Panas ... umix%20Gf1
http://www.dpreview.com/reviews/PanasonicGF1/
4: OlympusEP1: A bit cheaper than the others
http://www.teds.com.au/www/6/1001102/di ... 14864.html
http://www.dpreview.com/reviews/OlympusEP1/
There are many Bushwalk Australia/Tasmania members who know a lot more about wilderness photography and cameras than I do and I would like to get some opinions on my choices.
I have not finished reading the dp reviews yet, I hope to complete this soon.
Thanks
Tony
After some research I have decided to get a compact camera with a changeable lens and I have been looking at these cameras in order of choice.
1: Leica M9, for quality this is by far my first choice but I have ruled this camera out as my wife has refused to let me take out a mortgage on our house.
http://cameras.teds.com.au/search?w=leica+m9
http://www.dpreview.com/news/0909/09090909leicam9.asp
2: Sony nex-5, I like this camera as it is the lightest of the four thirds with changeable lens camera.
http://www.teds.com.au/www/6/1001102/di ... 88338.html
http://www.dpreview.com/reviews/SonyNex5Nex3/
3: Panasonic Lumix Gf1:
http://cameras.teds.com.au/camera/Panas ... umix%20Gf1
http://www.dpreview.com/reviews/PanasonicGF1/
4: OlympusEP1: A bit cheaper than the others
http://www.teds.com.au/www/6/1001102/di ... 14864.html
http://www.dpreview.com/reviews/OlympusEP1/
There are many Bushwalk Australia/Tasmania members who know a lot more about wilderness photography and cameras than I do and I would like to get some opinions on my choices.
I have not finished reading the dp reviews yet, I hope to complete this soon.
Thanks
Tony