I guess I'm not really clear on why you were asking about the Bolex if you specifically want to shoot digital, but if you want your stuff to look like film, you should consider shooting with a 35mm lens adapter, like a Redrock Micro M2 or a Letus35. It greatly increases your DOF options, as well as lets you use 35mm lenses with you camera.
I'm going to strongly disagree with this statement, at least so far as the usefulness of an adapter in a documentary setting is concerned.
While the adapters you've mentioned are pretty cool and surprisingly functional, they offer a number of trade-offs that make them best suited for narrative rather than documentary (as the first poster suggested was his interest) shoots:
Most adapters lose about two or three stops, rendering a 320ISO digital camera as slow as 80ISO; this makes noisy cameras such as the panasonics virtually unusable in an indoor environment without significant additional light; maybe for talking heads these adapters are useful, but not for anything spontaneous.
Adapters require a follow focus, external monitor, and a decent-sized crew capable of off-the-cuff focus pulls. You can't really zoom in an unlit interior unless you rent a dozens-of-thousands-of-dollars PL mount zoom, as SLR zooms are strictly f2.8 and slower. You may not agree, but if you only have one chance to shoot what you're shooting (as you would in a documentary), you won't have time to light, repeat focus pulls, etc. Furthermore, if you have multiple planes of action, good luck getting the stop necessary to render them all in focus.
It was the introduction of cheap sync-sound 16mm cameras and increasingly fast film stock that spurred the popularity of Wiseman-esque documentaries in the late 60s and beyond. The benefits of these cameras included comparatively deeper focus at the same sensitivity on the order of two stops, portability, and the ability to have a very small crew. The 35mm adapters offer none of these benefits.
Furthermore, the majority of bolexes I've used have had t2.2 to t2.8 lenses with a 16mm 4X3 frame. Assuming you're cropping for widescreen and finishing on high definition, you should have a similar depth of focus on the bolex as on the EX1, which has a 1/2'' sensor and f1.9 zoom lens. Of course, super 16 would have a shallower depth of focus, but I don't know of any super 16 bolex cameras. So stock up on some ND filters and you should have no problems in this regard if emulating the aesthetics of 16mm (rather than the "feel" of the Bolex camera, for which I'd recommend the hv40) is indeed your goal.
