Welcome hear. That is a tough question indeed. I liked the results of the GX100 a lot, and I love the improved handling and speed of the GX200. I use(d) both cameras without the VF1 and never felt the need to buy one. The G10 looks amazing too, but is quite large as you mention.
If I would currently be in the same position to buy a serious compact camera I would opt for the Panasonic LX3 instead. To me it seems this camera has improved dynamic range, better low light performance, and a great looking dynamic B&W in-camera preset. Only the user interface can't be compared with those of the Ricohs. Ricoh has some of the best user interface in any compact camera in my opinion.