1. You don't want a refurb of something like these
2. If you get one - go with 200Mbps

#1 I had a friend ask me if these type of adapters work well for 1080p video, any experience? How relevant is the distance between the units to signal quality?

Since they are running on power lines the signal loss should be extremely little, I think.

My buddy just got his shipment, plugged it in, and POW! internet in his office two stories and a long way from his router.