Wow, they've come down in price! I actually wound up with 200Mbps TP-Link adapters, because the 500Mbps adapters fall off to fast with distance in my house. AV2 adapters are supposed to sustain performance better over distance, so I'm biding my time and waiting for those to mature a bit.
http://www.amazon.com/TP-Link-Powerline-Ethernet-Adapter-TL-...