Seeking Your Expertise! Integration Concerns for MSIGTX680Lightning

Hello everyone @ tomshardware - here goes nothing for my first post  !

TOPIC ON HAND: After extensive research and such, I've decided to pull the trigger on a MSI GTX 680 - Lightning Edition!
I'm planning to throw this into my current comp, current specs are as follows:

CURRENT COMPUTER SPECS:
CPU: Intel Core i7-920 2.66Ghz 8M LGA1366 CPU
GPU: EVGA GTX 260 Super clocked (see ya later!)
PSU: ULTRA X4 750W POWER SUPPLY MODULAR
RAM: Corsair XMS3 6GB DDR3 Tri PC12800 1600MHz (3x2GB)
HDD: WD Caviar Green 1TB 32MB/SATA-3G
MOBO: Asus P6T Intel X58 Socket LGA1366 Motherboard
OTHER: LG 22X DVDRW SATA w/o Software

I've been riding high on that giddy feeling of buying a new premium part, but it's slowly fading as I now have some fears of bottlenecking with the other parts of my system...

QUESTIONS: This is where I was hoping I could get some of your guys's help. The following were some of my fears, concerns, and burning questions (and excuse my noobness, I'm still amateur-intermediate-ish at building and assessing rigs):
1. MOST IMPORTANT: Do any of my parts (thinking my CPU Intel i7 920) need to be upgraded to avoid bottlenecking?
*Budget is non-concern, but achieving my goal is in a cost min-max scenario: to play Farcry 3, Battlefield 3, WoW at ultra settings, ultra AA/AF on a 1920x1200 with constant 60 fps

OTHER:
2. Will I need to upgrade my PSU to accomodate for the new card?
3. Will I need to buy a new motherboard to accomodate the PCI 3.0?
4. I know this card should fit in my rig because it's similar to the GTX 260 I have size-wise, but are there any other things I should watch out for in terms of "intangibles" when setting this up?

Really just trying to cover all angles on this new purchase!
And I'm looking to spend big this time around so please feel free to recommend any PSUs, MOBOs, CPUs, or anything I should be lookign to upgrade alongside this!