I just received my R-D1 last week and sold my DMC-LC1 this weekend. After taking about 100 pictures with the R-D1 I don't regret the switch one bit.
The R-D1 is so much more comfortable in use. I didn't mind the EVF when I had the LC1, but now that I see though a real viewfinder again I don't know how I put up with it. The viewfinder isn't just good, it's great. As good as my M3 and M6 were (going by memory).
The buffer on the R-D1 is not huge, but it's useable and I doubt I will miss many shots due to a full buffer. With the LC1, I lost dozens of shots during the 6-Mississippi countdown.
The R-D1 picture quality is also much better. It's not the 1 megapixel jump that matters. It's the shadow detail, lower noise and over "look" (sorry, I'm not a pixel peeper so I don't know the technical terms to describe the difference).
Because of the R-D1 quality problems, I would avoid evil-bay and any other place you're not sure of. I ordered a mint one from Photo village. They assured me the rangefinder was fine (and it is) and will adjust it for free for 90 days.
By the way, the Digilux 2/DMC-LC1 are far from reliable cameras in my experience. I've owned two and both failed. The first had a problem where the aperture wouldn't stop down and the sensor went on the second. The sensor failure is not a rare problems from what I can tell.
I say go for it
Chris.