W3000 - on-screen contrast ratio: 2000:1; dynamic contrast ratio: 16000:1
XBR 3 - on-screen contrast ratio: 1300:1; dynamic contrast ratio: 7000:1
W3000 - 10-bit panel
XBR 3 - 8-bit panel
There's no question, spend the extra few bucks & get the W3000.
I also owned the Sharp 46D62U, which is more or less the exact same as the 46D64 & i wasn't impressed, besides banding, it had red push, weaker contrast, like the Sony sets it had a auto-dimming that can't be turned off (only really dims when the entire screen is black)
The motion is the same as most other 8ms LCD's even though it has a better response time of 4ms.