First, I'll answer your questions in turn.
1. Focal length X1.6 That's because the CMOS size is not 35MM (full-frame), for APS-C machines (60D 7D) according to the ratio is just X1.6. The significance of this is the same as the small hole imaging, due to the CMOS is small, so the lens to bring in the loss of some of the light.
2. Although the CMOS is large, the bokeh is more rounded and obvious, but the depth of field is more critical issue is the quality of the lens.
You can take a 38,000 EX-1R look, the effect and 5D2 can not be compared, right? But if the EX1 + MINI35 + lens and look again, the same 1/2 CCD, but the picture quality appears to be a fundamental difference. In fact, the lens is more critical.
3.60D do not buy, plastic body does not really matter, flip screen nausea, and imaging in general. The video, daytime and 5D2 can fight under the 7D, night as usual not. 60D and 7D, CMOS is not much difference, just noise suppression what 7D better, after all, different prices.
4. Don't look at the video function of the autofocus. That one is redundant. Whether it is a professional movie or TV station, or students like us, are manual. Just ignore it automatically! At first it will be difficult, more practice Follow focus and you will get it.
5. Don't listen to what a certain person upstairs said DSLR video don't think. That's because he hasn't used it. A while back, the movie "Old Boy", China's national propaganda film, as well as some low-budget Hollywood movies and some CCTV programs have used the 5D2. For individuals, this machine is really the closest to the movie.
6. Don't listen to someone upstairs who says that the 5D2 CMOS is too big to be like a movie, but SONY's top-of-the-line F35 movie camera is a full-frame 35mm. And you don't think the 7D is so awesome. 3CCD is the key to professional cameras.
I hope you can help!
I hope this helps you!