From the review testing here for the TP-LINK TL-PA8030P AV1200 (AV2-MIMO), giving over 200Mbps at location C, I've been thinking about using a wireless router as an wireless AP, connected to my main router that has its wireless disabled. This would allow me to locate my wireless AP much more centrally in my house, which would be a real advantage over my current configuration. The central location is about a room over, on the same floor, from my main router, so it should be comparable to location C in the review here.
All I have now as ethernet cabling substitute is early MoCA, which seems to support up to about 85Mbps, and while that's fine for media streaming at my entertainment center, it just isn't enough to support our current ISP full download speed of 150Mbps+. I was hoping to see some second generation MoCA adapters that would run more like 200-400Mbps, but they never materialized, darn it. They'd be perfect for what I want to do, but...
So I'll either get the new TP-LINK powerline network adapters mentioned above to play with, or wait a while longer and see what happens with powerline networking speeds in the coming months.
So my take on the OP's original question is to try the AV1200 products after reading the reviews at this site.
Update: Now I'm seeing some MoCA 2.0 adapters, have to take a look at those:
Actiontec MoCA 2.0 ECB6000
I see that there's a long thread on these here, will be reading through that to see what's going on with these new adapters. This makes me feel a little better *smile*.