I’ve tried the first one and the last one at frys.
Don’t get the one from the third link. It definitely isn’t worth the money.
For budget speakers I would defintely cough up the money for this one - sounded really great - http://www.newegg.com/Product/Product.aspx?Item=N82E16836116024&cm_re=creative--36-116-024--Product
If I was going with logitechs, I would go with something that is THX certified, else I would go with the budget creative speakers.
Quick tip for the sound card - get one that has FPaudio connector (technology by Intel). Of course your case needs the FPaudio connecter too in order to use the sound and mic ports in the front - not to worry if your case is somewhat modern.
This the sound card on my main PC - http://www.newegg.com/Product/Product.aspx?Item=N82E16829271001 Some of the highs and lows are better than SB X-fi in games.
When you purchase your next sound card make sure it has FPaudio connecter. hint: If you are going with X-fi chipset you gotta pay attention to X-Fi cards - many of them don’t have FPaudio, only some do.
Another tip since you are going to be a network warrior… its generally a good idea to put peripherals on PCI-express instead of regular PCI slots.
What is the top gigabit speed? 1000/Mbit divided 8 = 125Megabytes per second.
What is the total shared speed of regular PCI slots? 130MBps shared.
What is the speed on PCIe slot? 250Megabytes per second unshared with other PCI/PCIe slots.
So to achieve maximum transfer rates, separate the data channels from the NIC and other peripherals utilizing PCIe.
here’s a starter for you - http://www.tomshardware.com/reviews/gigabit-ethernet-bandwidth,2321.html