Chris, I have two Letus Ultimate 35mm adapters and a Letus B4 Pro 2/3" relay lens. I don't think they're better than the Pro35, but quite similar and much less money when new.
The whole "Full HD" or "Full Raster" thing is just marketing, 720P using AVC-Intra 100 IS full raster. In the days of DVCPRO HD, 720P was limited to 960 horizontal. Now it's 1280 horizontal, so one could argue that if 720P was considered good in the tape Varicam days, it's now really good, especially when combined with 10-bit color depth and the efficiency of MPEG4.
As far as spanned clips, I can't remember if that can be defeated. I have never had an issue with spanned clips in post, at least none that a client has called me about.
The 2700 has more latitude, true Native frame rate recording, a much more sophisticated studio quality codec, Film Rec 600%, more variable frame rates, 32 bit DSP, additional gammas, chroma control, hi-color(not to be used with Film-Rec), color correction in addition to matrix controls, five P2 cards are like carrying a case of tape in the camera, no more cueing of takes, much faster data transfer, meta data, proxy option, CAC--really a big, big step over a legacy tape Varicam.
Jeff Regan
Shooting Star Video
http://www.ssv.com
