I will second the MoCA recommendation. You can probably get 200-400Mbit/s over MoCA which is a lot better than you will actually get with 802.11n. The Netgear MCAB1001 kit is $80 on Amazon right now. I recently bought two used Westell 9100EM routers (predominantly used by Verizon in FiOS installations). They have MoCA, an Ethernet switch and 802.11g wireless. You might need to upgrade your cable splitters to pass the >1GHz signals and allow bidirectional flow, but those are simple upgrades.

I heard a story on NPR a week ago about a new book by MIT Professor, Dan Ariely, talking about what happens to our "rationality" when we are offered something for free. From the interview, it sounds like the rules of economics break down when we are offered something free.

http://www.predictablyirrational.com/
http://www.npr.org/templates/story/story.php?storyId=19231906&ft=1&f=2