yes it will x) and i love the HAF cases
i got a HAF case i'm currently modding >:3
The sound card has a pci express x1 interface.. So quite obviously it won't work on a pci slot even if it were free.. There is a third pci express slot on which the card can be installed though.. My recommendation was to just skip that option as it might hamper with the airflow..
i know it has a x1 interface, i put bracket
ad yeah you don't wanna mess with the airflow unless you really need too =P