I can only tell you a bit about the LX5. I have been using the camera for over a year now. I got introduced to this camera by a street photographer who used an LX3.
Pros
1. Pocketability. Its great to carry around, if you're wearing a jacket. You can stuff it down your trousers but you can't get it out
This screw on lens cover makes it a 100 times more convenient.
Amazon.com: Auto Lens Cap for PANASONIC Lumix DMC LX5 LX-5 LEICA D-LUX 5 (Black) + Premium Goja Microfiber Cleaning Cloth: Electronics
2. Shoots great B&W. I love it's black and white film grain mode, and if you are primarily looking at web sized resolution the images you get are fairly usable once you reduce sizes.
3. Fast wide angle. At 24mm f2.0 this is the best wide angle lens out there in this class of camera. Period. (Moving on to another camera has been a difficult decision for me since I can't find anything this portable that has a 24mm lens, and I've gotten used to seeing landscapes this way).
Cons -
1. Piss poor jpeg image processing. (It might be an idea to check out the Leica D-Lux5, which is essentially the same camera which uses a different in-camera processing engine) With the LX5, you are forced to shoot RAW and tweak pretty much all your pictures, and if you're a casual shooter like me, it can be pretty irritating.
2. Manual focus is useless. Don't bother.
3. My main grouse with this camera though, is that it doesn't inspire you! I feel at most times I'm fighting the camera to get decent results. But then I see examples of what people have done with this camera and I'm left amazed.
Here are a few pictures I've shot with this camera -
Flickr: boidie's Photostream
Best of luck!
edited - spelling, syntax, also forgot about the Samsung TL500, which is another good travel camera in my opinion with a 24mm f1.8 lens