You know, I can barely understand why anyone would choose an EBM over a Rex-5 or SBM. Apart from the fact it has a built in motor it appears far less versatile than any of these cameras AND from what I have seen usually costs more. You still need an external controller for crystal sync anyway and as you pointed out no single from nor 64fps.
IMO, I think the Rex-5 with the Switar prime set is one of the best sub $2000 16mm you can get, I paid only $1150us for mine and the Tobin motor only adds another $495 onto that. Bargain!
That's funny. I wanted a rex 5 but I found a really good deal on an SBM so I wound up with one of those! SBM with the bayo mount is easier to do the conversion to Super, which I did but for now I'm just shooting regular anyway (ideally, SBM can switch back and forth). And my POE zoom had a little fungus so I ended up with primes anyway. (Seems like with ebay there is always something wrong with something). And I got the same Tobin motor you're talking about.
The bolex bayo mount is beautiful but sort of limited because there is only a very few switars that fit on it. They are very good lenses though, anywhere from the POE switar up to the PTL and other versions (pricey). Those zooms are a little big for handholding and travel though, so the primes are better for that. The zooms are still pretty fast though at 1.9! ANyway, you can also get adapters for c mount or PL mount... whatever.
Anyway, let me know how the camera works out.