dsapper - I am completely knew to the GN scene, but I read through this entire thread last night... What else can be said for this build that has not been said? However I will congratulate you for sticking with it and building an awesome machine!
I do have one question for you... looking back at what you started with, speaking honestly, do you regret anything you did along the way and if you had the chance to start over would you attempt to build what you have? I mean that in the most curious non-judgemental way possible.