Graphics Card Query

[dhilan93]

RAM - Corsair 8-16GB 1600MHz
CPU - Intel Core i5 4690K 3.5GHz Socket 1150 6MB L3 Cache Retail Boxed
Motherboard - Asus B85M-G Socket 1150 VGA DVI HDMI 6+2 Channel HD Audio mATX Motherboard
SSD - SanDisk 128 GB 2.5 Inch Internal SSD 475 MB/s
HDD - Seagate 2TB Barracuda Internal Hard Drive
GPU - Sapphire R9 280 DUAL-X 3GB GDDR5 Dual DVI HDMI DisplayPort PCI-E Graphics Card
PSU - Corsair CX 500W Fully Wired 80+ Bronze Power Supply
Case - BitFenix Prodigy

I have the current build list (not bought) above and i was wondering whether i should get either Sapphire R9 280 DUAL-X 3GB GDDR5 Dual DVI HDMI DisplayPort PCI-E or MSI R9 280 GAMING 3GB GDDR5 DVI HDMI Dual Mini DisplayPort PCI-E Graphics Card ??? Is there much differnce between the two?

 

[dhilan93]

What about this mobo ? Will this be suitable too?

Gigabyte Z97M-DS3H Intel Z97 (Socket 1150) DDR3 Micro ATX Motherboard

Sort of fits better into my price range trying not to go over £650.