I hated the images from my X10. So much so that I returned it. The resolution stinks. The colors are fantastic but the resolution is still very much in the P&S camp. Coming from a m4/3 I have to say that the m4/3 has nothing to worry about from the X10.
The other thing that's bad about the X10 is that the focusing is inconsistent. It will many times refuse to focus properly on what you want causing you to try to lock on your subjects multiple times. You can't have a focus system that's like this if you care about missing shots. The Gf series is multiple times better at focusing than the X10.
Back to Best Buy it goes. Hopefully, version 2.0 will be better. They definitely rushed this to market without working out the bugs.