I7 860 versus 920

http://www.anandtech.com/cpuchipse [...] spx?i=3641

My recommendations from the initial Lynnfield review still stand, you'll want to opt for Bloomfield processor if you care about:

1) High-end multi-GPU performance (or other uses of high bandwidth PCIe)
2) Stock Voltage Overclocking
3) Future support for 6-core Gulftown CPUs

In terms of cost effectiveness however - the Core i7 860 is the way to go. With cheaper motherboards and higher operating frequencies than a Core i7 920, for the majority of users the 860 will be the better pick. Here's where the discussion gets interesting however.