Thanks for the info guys. All of my (4) wired computers have gigabit, but I may have to upgrade the wiring. I think it requires at least Cat 5e, and 2 of the computers are only wired with Cat 5.
I have a D-Link now, and it does seem to be the root of my problems. I get a lot of dropped connections and the wireless range is not very good. What do you think about using is as a wireless access point to improve coverage in my house?
I like the Airport Express, but it's a bit pricey. I'm leaning toward Linksys at the moment.