I am considering getting a “vest pocket” camera. I like my Panasonic LX3 for what it is, but it’s not a viable low-light camera. The one feature I lack now that I want in a travel camera is a variable angle LCD. I am considering either getting a Canon (which adds a second battery type and a second memory type to 5D2 but keeps the same lenses) OR getting a Panasonic GH2 and 20/1.7 and 45/1.8 lens pair. The advantage of the Canon is in the slightly better image quality and the ability to use the same lenses (35/2 and 85/1.8). The down side to the same lenses is the size — Canon doesn’t seem to make fast APS-C primes. GH2 with a 20mm or a 45mm will be close to half the weight of the T3i and 35mm or 85mm lenses. Other than the formidable cost of getting a body AND two lenses for it, is there any reason to prefer the Canon over the Panasonic?
I have not seriously used a camera with an electronic viewfinder or a variable angle — am I going to hate it in low light or when following action? The comparison would be to a porro-prism finder of the T3i, not to the glass prism of the 5D2. Live View on 5D2 is painfully slow. Is it any better on GH2?