True, I don't need the gigabit for the internet. I do have another computer on the network that can take advantage of gigabit, so it would be handy for the sake of transferring files. I'm more or less wondering if any particular card is superior. Like, whereas one can handle bittorrents with ease, the other might choke up. Or are NICs, for the most part, generally all decent?
You won't be able to tell the difference between various NICs (100 Mbps or Gigabit). Buy a Gigabit NIC if your switch is Gigabit and you need the faster transfer speed.