I use Sapphire cards all the time and have never had a single issue with them. One of my systems right now is using a Sapphire card.
The sapphire cards work great. All I am saying is I believe the cooling from the IceQ HIS cards overclock better and had better cooling. The sapphire cards are a bit cheaper, however the Cooling on the IceQ cards I believe is worth the small increase in price.