The 2 real deal breakers for me would be the lack of a gamma adjustment and the lack of colour temperature presets of the correct value.
What I mean is that even my cheap InFocus IN72 has 5 gamma settings, and the TWO THAT I CANNOT LIVE WITHOUT are 1) VIDEO gamma for video (not film) based material, which is a higher gamma than the film gamma setting, this is what I use for watching SD video from Freeview (UK Digital Terrestrial Television), and I would need the same setting for watching the video based material on Sky or Sky HD, or cable TV (Virgin Media). There is a big difference between video gamma and film gamma.
Also even on my cheap IN72 the colour temperature is adjustable on 3 presets, and there is one that I CANNOT live without, this is the 9300K setting which is the correct colour temperature for video. Actually there is a third setting like I say which is 7500K which is good for warming up the video image a bit on the ECO lamp setting.
If the JVC added the video gamma setting and the 7500K and 9300K colour temperature presets then I would be a LOT more inclined to buy it. I know that it is currently the best performing video projector on the market at anywhere near the price, but 3,500 GBP is too much money for a pj that lacks such basic fundamental settings IMHO.
I am very much looking forwards to when JVC fixes these issues in a Firmware update...IMHO they should take a look at InFocus's menus and add the 'missing' features
And before anyone starts, I am not JVC bashing... the JVC is awesome and I would love to own one.
Cheers,
Alistair G.