those 300c specs don't tell me much: with all that, it could be just as good as the alexa (and thus worth $60K), or only as good as the FS100 (and thus worth $5K)
at this level, for most work it's not so much about resolution (whatever RED people say), but about dynamic range, color rendition (specially skin tones), etc
for example, the alexa only records 1080p, but it has 14.1 stops of DR (vs. 11.2 for the 5D2, pre-cinestyle, and 14.5 for film), and the best skin tones among all these cameras according to a lot of very knowledgeable people
http://nofilmschool.com/2011/06/zacuto-unleashes-great-camera-shootout-2011/and that's why it's worth $60K (to some)