Yeah, I rebuilt my rig at Christmas and the first thing I did was download the hi-rez texture packs.
AMD FX-8350 @ 4.2Ghz
Asus Crossfire V Formula Z MB
16 GB of Gskill PC3-12800 @ 1860Hz
XFX Black Edition Radeon HD 6870
500 GB Western Digital Raptor
The easiest place to get mods is - the Steam Workshop. Just check the ones you want and you're done.
I have absolutely everything maxed. 1900 x 1080. There is nothing else I can turn up.
I am maxing out at 60 FPS - my monitors refresh rate.