From what Ive read, both projectors are very similar in image quality, but the Sony has de edge on a few things, first of all you wont have trouble with dust getting in your lcd screens, because the Sony is totally sealed, another nice feature about the Sony is the Reality Creation that gives a more crisp image, its similar to Darbee, Ive also read that the dinamic iris on the Sony is the best there is, apart from this I think they are probably very close, its your choice to decide if the 1000 dolar diference is worth it or not.

Here you can see the diference of the Reality Creation on the Sony that gives it more definition.
Order from top to bottom: Sony 50, JVCX35, Epson 5020UB




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