If you’re willing to buy another router, you may as well try a WD Livewire or similar device, especially if you find it impossible to run an Ethernet cable from the router to the WD TV (which would be the best solution).
But before that, you could try tweaking your router’s settings. It appears that, even though your router is Wireless-N, you’re operating at Wireless-G speeds (~20 Mbps), unless you’re far away from the unit or your laptop doesn’t support 802.11n.
Without knowing the brand of your router, I can tell you to try the following:
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Make sure you’re running WPA2 security, as Wireless-N requires it.
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Check that WMM is enabled in your router (if the option is available), as the 802.11n specification says it’s required to achieve Wireless-N speeds.
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If you have a 300+ Mbps (as opposed to a 150 Mbps one), the WD TV works better with a 40 MHz channel width (which is needed to reach 300 Mbps), as the manual says.
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If your speed still suffers, try switching your router’s channel. Usually 3, 6, 9 and 11 are the best. It all depends on the amount of devices in your vecinity running on each one of these channels.
