The RX1/RX1r will give you the best 24mp IQ available, it its true classic!!. The lens is insanely awesome, super sharp wide open almost to the very edges. I have RX1r and love it, but if I had to buy it over again I would have picked up the RX1 because the R version does produce heavy moire and digital artifacts(even in landscape shots) that I think would be less of a problem with the RX1. These are fixable in post but add extra time. I have compared my files to a friends RX1 and I can say the difference between the two is very SMALL! Also the electronic view finder is a must, and you probably want to get a lens hood and grip.
As a landscape camera it's great if you can live with 35mm?? It is a really enjoyable camera to work with and I really like that I can use a traditional threaded cable release.
As a street camera its great because it's small and silent but the auto focus is slow, albeit very accurate, and it cannot lock onto moving objects. I mainly use it for urban landscape.
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