It really depends on what you need your network to do. If you just need to have internet in both locations, go with a basic wireless G; Linksys or Netgear.
If you need to share files between your pcs you may want to go up to the new wireless N ( potentially 2x the speed). The distance from your wireless pc and the router is a speed factor, and so is the construction of your house. The longer the distance, the less speed. I've seen a big difference in houses with steel framing not working as well as houses with wood framing, too.
I just upgraded my wired router for a Netgear simply because it was $20 on sale at Staples. Linksys has more add-ons, like boosted gain antennae.
Hope that helps
Good luck