I have no idea how this can be a split decision. The e8400 is now dead and out of production. As of Q1 2010 Core2 has been replaced with the i3, i5, and i7 series CPUS. The i7 920 is categorically faster in every benchmark and performance test to an e8400. Even intels own presentation matierals have ranked the i7 920 above core2 quad since its release.
Here is an article with an overview of intels plan and performance over the last couple years, as well as performance comparisons of the most common CPUs.http://www.xbitlabs.com/articles/cpu/display/clarkdale-review.html