New system need help with mother board

Approximate Purchase Date: Before end of September

Budget Range: $300-$500 (Mother board price is between $150 and $200.)

System Usage: (Most) Gaming (BF3), Internet, Video encoding, Rendering in Auto desk products, Photo shop. (Least)

Are you buying a monitor: No

Parts to Upgrade:
CPU: i5 3570K http://www.umart.com.au/pro/products_listnew.phtml?id=1...

RAM: 2 x G Skill (CL9D-8GBRL) http://www.umart.com.au/pro/products_listnew.phtml?id=1...

Mobo: Asus P8Z77-V_LE_PLUS http://www.umart.com.au/pro/products_listnew.phtml?id=1...
or
Asrock Z77-EXTREME4 http://www.umart.com.au/pro/products_listnew.phtml?id=1...

Do you need to buy OS: Yes but I have it sorted, I will be getting windows 7 Professional

Preferred Website(s) for Parts: www.umart.com.au - Logan
or
www.pccasegear.com.au

Location: Don't worry about it the parts are going to be picked up if from umart or shipped if from pc case gear.

Overclocking: Maybe

SLI or Crossfire: Yes, although I have got that sort with these mobo, both having dual x8 mode.

Your Monitor Resolution: My monitor res is 1440x900 but shouldn't be issue.

Why Are You Upgrading: I am upgrading because my system is starting to get a bit old and I want a new computer for future games and I need a faster computer for rendering images in Revit and Inventor.

Additional Comments: If you go to suggest a new mother board is has to be either ASUS, ASRock or Gigabyte.

Other specs if you need to know if you suggest new board:
* Dual x8 mode on the PCI-E x16
* Must support surround sound on board
* Must be Z77 chipset
* Must support at least 3 or better way SLI or Crossfire
* Must be ATX
* Must have dual channel memory and support 4 DIMMs at 1600 Mhz