Bravia W Series or XBR

[Diogenes]

I've found a KDL-52W5100 for $1499. That's $500 less than the XBR9. Is the XBR worth the upgrade? Seems like the W gives most of the XBR but at a much better price. Both have the same Bravia 3 engine. Main differences seem to be the 120MHz v 240Mhz, x.y color, different backlight. I know the XBR has a lot of supporters, but is it worth $500 more than the W?
Thanks