I right now have the GF3, but the only thing I really starting to hate about is the jpeg quality at higher ISO(kind been spoiled at high iso by Sony A57 I had and the X-E1 I now have). I am probably going to keep the GF3 as underwater duty with the housing I have for it. I've notice that GM1 body only is going for temping price which has me asking about it from previous GF3/5 owners. I use to take my GF3 with me almost everywhere(but the X-E1 took it's place right now cause of the high iso and jpg). My question is, for those who have used the GF3/5(or similar Panasonic from that generation) does the GM1 offer better or worse jpg quality? Is the lower battery life vs GF3 something to be concerned about? And 1/50sec shutter speed w/flash a problem for those coming from camera similar to the GF3? Is there anything else to know about this camera? Thank you.