Agreed. Wireless isn't really all that reliable. The amount of data you can reliably send falls off very fast with distance and obstructions. In addition there is a large amount of errors with wireless networking causing resends, so if you ever use online gaming your experience may be sub standard.
Homeplugs are much better than wireless, at least usually, and now with faster and faster solutions they won't throttle your internet connection.
Cat5e/Cat6 Ethernet networking still remains the best home solution. If you can run the wires then it's probably better to do that, especially if this installation is going to be in use for the longer term.