answer:My first advice is that if you have the machine on an ethernet wire, that’s not in the way, keep the wire. A wire will always give you more reliable service and Much faster service than wireless. Any “802.11n” standard card from a name brand will do pretty well. (3Com, Belkin, Netgear…) The PCI slots are just fine for this. It is easy to do. You will have to remove the little panel at the back of the machine that corresponds to the slot into which you’re installing the new wireless card. That involves either a philips screwdriver (on nicer cases), or possibly having to knock out the panel if it’s not screwed in. Yes, be careful of static electricity. Be sure to touch the metal of the case, before touching the card or installing it, to dissipate any static built up on you.