On newegg, the motherboards and cpus cost the same (2500k and 8350), and the 2500k is better, by a significant margain in real world computing. Really a no-brainer.
Let's use ASUS as an example.
ASUS Sabertooth R2 AM3+: $190 <--- Notice it's the R2 version
ASUS Sabertooth Z77: $255
ASUS Sabertooth X79: $340
Please stop making false claims.
While the AMD AM3 system hasn't changed all that much, on the Intel side, you're getting a substantially more powerful computer today than earlier this year, and one with much better upgradeability to boot.