We're giving advice about things he didn't ask for because we're self-important and we think everybody cares to hear our opinions. Obviously. Also, we think he's silly for spending that much on one rig
As for the UPS, you obviously don't live anywhere that has brownouts. UPS's are very handy to many of us.
And the reason he's getting a $500 TN panel is because its an ultra-high-end 120hz refresh rate screen, perfect for the highest-end FPS gaming and such. Let's hope that he has need for such a thing, as I'm sure most of us could never tell the difference!