It's a really nice motherboard, it's hard to find motherboards wich have ISA these days.
Btw i have a ASUS Essence STX2 pci-e soundcard, and i can only recommend it. it's many many times better than onboard soundcards. Have many more details than the ASUS X79 DELUXE onboard sound. its really nice to have a soundcard with phono, as thers no need of adapters.