I have the gigabyte GA-EX58-UD5. So no opinions on the wireless card? Not sure if I really want to move the routers as I'm on one end of the house and it could hurt the people on the other side. THe router is currently pretty much directly in the middle of the house.
Look at Cisco or Linksys, but a good wireless card won't solve the problem if you use a cheap router. Running a Cat5 cable and connecting directly to the router always works better (gaming or not).