Yep, it might even be the same thing. In fact, if you have a well-made video cable, then it will work fine for digital coax (because it also has a 75 Ohm characteristic impedance). If you DO have an optical output on your motherboard, your reciever has an optical input, and your computer is close to your reciever, then I'd go for the optical option.
Impact Acoustics has a good deal on TOSlink cables (discount to Audioholics readers). Also, they have good prices on 75 Ohm cables that work well for digital coax as well. I'd give them a try if you feel like ordering.
For other brands, Radio Shack Gold is fine, as are Philips and Acoustic Research. You can find these brands at your local retail stores. Just don't get caught up in the Monster hype...it's a ripoff.
Also, about the suggestion for Cobalt Cable. They make quality stuff, but unless you care that much about looks, you can get the exact same thing from Blue Jeans Cable for a lot less money.