The reviews I've read so far agree Canterwood boards real performance increase comes with the 800 MHz processor and DDR 400 memory. With the 533 MHz processor the Canterwood memory is locked at DDR 333.
It depends on the performance level you desire, and upgradibilty you might want. The 875P chipset boards support all P4 bus speeds (400/533/800), the chipset is faster than any other P4 chipset (even at 533 bus), and it allows you future CPU compatability.
<font color=blue>Watts mean squat if you don't have quality!</font color=blue>