Computer Monitor Accessories Hooking Up Xbox 360 To Computer Monitor?

Hooking up Xbox 360 to Computer Monitor? - computer monitor accessories

I have a computer monitor:
http://accessories.us.dell.com/sna/produ ...
And the speaker system:
http://reviews.cnet.com/pc-speakers/atp3 ...
I wonder if I bought this cable:
http://www.xbox.com/en-US/hardware/x/xbo ...
I would be able to control my Xbox 360 to connect to my computer to play in 1080p with sound? If you do not get the sound that I buy a converter from one species to the speaker that you have or buy new one does not connect? If I only need a converter, I can tell someone / link me a good, it work for a decent price.