[rodi]

i definitely would say it's a hell of a lot more than marginally better than a dslr. have you ever graded 5D/7D footage?? and graded footage from the C300? HUGE difference.
and you do not have to use proprietary cine-lenses - there's a PL mount version and an EF mount version, and last i checked, there were tons of each type of lenses available.
and the "log file format" you're referring to is just a gamma curve used in grading. it's just like the cinestyle lut for the 5D.
the MXF files that it outputs have long been used by Avid and other editing software, which is easily transcoded for dailies. the workflow is the same as RED minus the extra steps tweaking the raw data and doing one-lights. hell, it's the same as dslr footage - you can even edit it natively in FCP.
and the scarlet is not 10K - you can't do anything with just the brain.

i'm not saying the C300 is as good as the Scarlet, but it's definitely got its advantages and disadvantages over it. and its footage is a hell of a lot better than current dslr's.