Dual-X doesn't have the best cooling in the world , the Twin frozr is quieter and cooler but if its more expensive then the 270X from sapphire will do well too , however if not the case then grab the MSI Card
I found them on ebay,the MSI is 224 euros,while the sapphire is 195 euros.
Sapphire then.
I thought of buying that one in the first place.
But as a graphics card,which one is better,in terms of cooling,noise and other stuff,no matter the price?