Leica lenses are the top gun when it comes to lenses, but their price is even more top gun
I don't have had any experiences with the Panasonic digital cameras, but what I have heard if it thus far is that they are quite good. And they come with Leica lenses fittings, that's true but .... . Anyway, I should go for a Nikon or Canon, you won't regret it.
Cheers