More important than price is trust.
The Core 2 Duo/Quad on LGA775 is the last revision of the Intel Management Engine (ME) that can be completely removed. The me_cleaner script recently added the ability to clean this platform.
A Q9650 quad-core CPU is the best performance that can be reached on this board. I have two and I have run me_cleaner on both. I do my finances on the one that runs OpenBSD.