50D, 5D Mark II, 5D Mark III, Blackmagic Cinema Camera, Blackmagic Pocket Cinema Camera and Blackmagic Production Camera 4K.
That are your only options at the moment, if you want to record RAW vdeos in high resolutions.
The 60D has a write speed limit of 21 Megabyte/s. It can't be fixed, it is an hardware issue. And there's no lossless compression that can be achieved in camera that reduces the file size to 1/4 of the original size. So, yes. The 50D would be the better bet. No just at this point but in general if you can live without flipscreen and internal audio.