The JVC is most likely going to deliver the superior image. The black level of the JVCs is the gold standard in the industry right now, and there are very few complaints about the quality or reliability of their product.
The significantly dropped price by JVC this year is a great thing for consumers, and I know that my price runs around $2,499 on the JVC HD250 units from where I get them, so they are definitely in the category of the new Epson 8700UB. Yep, no lamp, but man, the image from the JVCs are basically untouched by any other manufacturer.