So I think I'm going to throw down some cash for a ASUS Xonar Essence STX sound card. One thing worries me though, I'm looking at my motherboard and GPUs and it's definitely going to be a tight squeeze with two 670s. I'm not entirely sure where the sound card should be placed, above or below? I'm worried if I place it above them it might get too hot and if I place it below it will practically be kissing the second card therefore blocking its intake fans. Is it even a good idea to buy a sound card with an SLI configuration? Any thoughts and opinions would be greatly appreciated!