As the HVX200 is native in 720p there's actually little to be gained in shooting 1080p. Either you're uprezzing in the camera or uprezzing in post. Considering you also lose the ability to shoot hi-speed in 1080 I'd push for sticking 720p. You also gain a lot more storage time. And as far as the JVC goes- it's not a fair fight at all with its more extreme HDV compression. If you want a camera that is a lot closer to the HVX you want the Sony EX1. That's about the only other camera in its class at that price range.
I'd also consider moving up to a 2/3" chip camera with interchangeable lenses like a Panasonic HPX500. Those will give you a much better 35mm print than prosumer cameras like the HVX or EX1. Also how you handle your footage in post and who does the uprez and filmout makes a huge difference.
Finally why the push for filmout in the first place? Generally as a DIY'er it's completely unnecessary. All festivals accept movies on digital- so no reason to get a film print for festival play. And if you are lucky enough to get a theatrical, run your distributor will want to be involved in the prints(i.e. control the edit, put on their logos) anyway so too early. In short, unless it's just the fun of seeing video printed onto celluloid it's a moot point (and a damned expensive prospect at that).
The whole point of shooting 24p is to end the expensive dependence on stock, process, negative, telecine, workprint, neg cut, answer print, optical soundtrack, release print, etc. Because the process is $$$.
-Noah
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