Match that card down below with a decent "N" wireless router (D-Link, Linkys's or Netgear) that does 300Mbps and you have something. $34.99
EDIMAX EW-7728In IEEE 802.11b/g, IEEE 802.11n Draft 32bit PCI Wireless 802.11n Draft 2.0 PCI Card Up to 300Mbps Data Rates WEP 64/128, WPA, WPA2 Cisco CCX V1.0, V2.0 & V3.0 Compliance - Retail <--- these two are worth looking at <--- 300Mbps wireless N routers