Originally Posted by phrider
Or should I just find a way to enable QoS on my existing router? ....
Try doing that first. It should help out with those big downloads that are causing problems.
If there's not a setting in the OS for that, you can see if other firmware will work on your router. One that many use is dd-wrt. The battery life comes from changing the beacon interval or one of the settings like that. Supported Devices - DD-WRT Wiki