Second the Olympus OMD EM5 with the 12-50 lens, both are weather sealed, biggest range of lenses for a compact system to choose from and you can get adapters for you Canon lenses. Only downside to the Olympus I feel is the odd menu system but once you get the camera setup how you like you leave it mostly alone oh and battery life, but that’s the case with most compact system cameras compared to DSLR’s.
Otherwise there’s the Canon EOS-M which is compact and has an APS-C sized sensor, the 18-55 that it comes with is pretty good for a kit lens and the picture quality is pretty good, probably on par with your 650. Downside awful slow auto focus on it.