I admire your sheer persistence with this!! I thought I had issues with my PC randomly rebooting / Blue screening since May - but this goes way back!
BTW, I'm also using an Asus MB, (P5LD2-VM MQ) and have also tried new RAM, I have a new SATA II drive etc... like you, my PC runs fine in Safe Mode with networking - frustrating!
I hope this isn't a waste of a post - but I just wanted to say good luck.
Steve