Tommy, I'm afraid, the thing is not that simple as it may look
LX3 is definitely great camera, as well as GX200. However, there are some consistent problems. At first, if you are a JPEG shooter, be prepared for a constant fight with white balance. No matter what WB settings you use, it's more or less wrong. It can be fine tuned, however, can you imagine WB fine tuning for each second shot? In this case, RAW is much better option for LX3. Of course, one doesn't need to worry about WB in B&W mode too.
Additionally, there are some more problems, or rather missing features and options, which are standard in Ricoh cameras. I really miss the step zoom but even more an option to save the zoom position in Custom settings. Missing Interval mode would be another showstopper for many people. And those used in Ricoh style of menu a workflow could the somewhat confused by LX3 menu and workflow. I'm still struggling with it.
And one more thing. Macro lovers should be warned about somewhat limited LX3 capabilities in this area. LX3 zoomed at maximum refuses to lock the focus for any distance under 25cm. GX200 zoomed at 60mm locks the focus (in macro) even at 3cm. And there is always the 135mm extension lens available for GX200, which can make the GX200 macro capabilities even more "extreme"
All in all, both cameras have their pros and cons. But if you are after perfect low light camera in pocketable form, LX3 is better option. I'm really impressed about its high ISO performance.