I like trendnet, never had any problems and pretty cheap.

16-Port ($88.69): http://www.amazon.com/TRENDnet-16-Port-Gigabit-GREENnet-TEG-S16DG/dp/B0044GJ516/ref=pd_sim_e_3

24-Port ($102.25): http://www.amazon.com/TRENDnet-Unmanaged-GREENnet-Auto-MDIX-TEG-S24Dg/dp/B0044GH27U/ref=sr_1_8?s=electronics&ie=UTF8