The Canon HV20 with the Brevis35 and, like, everything else, as exhibited and discussed here.
I'm totally anti the whole "gear fetish" thing. I've seen some DVX100 rigs that were clearly designed more to look badass than to actually create nice images. But this "HV20 on 'roids" is not frivolous at all—everything on it is something you'd eventually discover you need once you've made the decision to use a 35mm lens adapter. And this rig is still missing the BeachTek adapter that would allow the use of pro mics!
But while it's fun to contemplate how one might pimp out such a camera, let's not forget that the thing itself, right out of the box, can capture images that can help you tell your story. The rig above is a great reminder than the sultry images that 35mm adapters allow come at the cost of one of the DV Rebel's most valuable assets: agility.