Depends on your brand that you like. There is Netgear, Trendnet, Linksys, D-Link, Asus, etc.. Smallnetbuilder.com has a lot of good info to compare equipment. On my network, I use a Netgear GS-108 downstairs, and up at my a/v center I use a Trendnet TEG-S50g for the two switches on my network. Access points I have a Netgear WN802T-200, and a Trendnet TEW-690AP. Both of the Access Points serve a certain purpose. The Netgear is a Hybrid Wireless-G/N A/P, and the Trendnet is a true Wireless-N A/P.
One is on the back of my house, the other is on the front of my house, and we have the U-Verse RG downstairs to serve Wireless-B/G for two devices that come off that A/P. One being our Wireless thermostat with a Wireless-B radio, the other is a Foscam IP camera that is able to pick up the signal on the RG better than the signal on the Netgear A/P on the back of the house in a bedroom.
All I have is really just six ethernet runs in my place. Three for U-Verse, two for the Access Points/Switch combo, and one for a IP camera in the front of the house. Majority of my wireless devices come off the Trendnet TEW-690ap, two (printer & PS3) come off the Netgear A/P. This setup works for me, may not for you, but it is really up to you to decide what works best.
Netgear and D-Link make plug in Wireless Access Points, that use Ethernet over Power also. So it is again up to you how you set up your network how you want it.