Does anyone have any experience with the QoS feature on any of the BEFSRXX Routers? Does it really work? Does it work for gaming? Or am I barking up the wrong tree with any of these outdated routers? And if so, which Linksys router would be best suited for QoS where online gaming is concerned? Also which of the BEFSRXX routers is upgradable with 3rd party firmware?