OP @Poseidon, just saw the Asus EA-N66 refurb on sale at newegg today for $45 after $10 rebate & free ship. It's dual band, not sure of exact spec differences between it and the other unit you were looking at.
Thanks for the heads up. The main difference is that the RP-N53 offers concurrent dual band while the EA-N66 is either 2.4 or 5.
The reviews for the EA-N66 aren't really that great. I've even found a bunch of returns at my local Fry's Electronics store.