Just yesterday I purchased what is basically a brand-new RX100 IV from a user on FM. He said he bought it with the intent of shooting 4K video on a family vacation, but just ended up using his RX1 the whole time. The camera has less than 50 shots on it, comes with everything it did new, has a good copy of the lens (no decentering, which the seller had checked for), and I got it for 25% off MSRP. I had been keeping my eye on the RX100 series for a while now, ever since the Mk.III came out. I have a little Canon S120 that I take with me to the races when I help out on the pit crew, because it's a nice way to document some of the "behind the scenes" stuff that goes on. While the S120 was a nice camera, the slower lens and smaller sensor did lead to more "watercolor" images once light started dropping off. I also like to shoot video when I'm there as well, and while the S120 did managed to have 60p video, the small sensor and pixel binning didn't create the most stunning video. I had been watching prices of the Mk. IV and saw that they were typically selling for about $700 over on FM. One came up for about that price yesterday, so I jumped on it. If all is well with the camera and I like it, I'll be selling my S120 which after all the fees and what not, should bring my net cost for the Mk. IV down to about $500. Some things I like about the RX100 IV: 20MP, 3:2 aspect sensor that isn't far behind m43 sensors in terms of dynamic range or color depth. I end up shooting a lot of my landscape stuff in 3:2 anyways, so this will give me about 6MP of more resolution compared to the 14MP I get from a 16MP 4:3 sensor cropped to 3:2. All of the video options (4K, 24p, 60p, 120p, 240p, etc.) It's going to be a great little video cam, and I will likely end up using it over one of my GH4's for all of the slow-mo stuff (and depending on how good it is, I may end up selling one of my two GH4's :gasp Bright lens and big sensor. Yes, the lens speed does fall off rather quickly, but its still an f/2.8 which is damn good for a compact. The 1" sensor helps in this respect as well by delivering excellent noise performance. The camera should be here on Friday, which means I'll be able to play with it this weekend and see how it does. The weather looks like it should be nice as well, and I may even get up to do a sunrise shoot and compare the GH4, E-M1, and RX100 IV to see how they compete.