Rocketfish makes a super high quality Wireless HD kit, which sells for $199 at Best Buy. This kit transmits in the 60GHz frequency range, so there is no concern about interference with 2.4 or 5 GHz networks. Also, the latency is less that 4ms, so you can use it with any type of source, including fast-action gaming. The 60GHz frequency allows for the full HDMI signal to be transmitted wirelessly with absolutely no signal compression or bit dropping - every bit of data is transmitted just as if the source was connected directly to the TV with a HDMI cable. The only downside of 60GHz is that the range is limited to about 30ft within the same room - does not travel well through walls; but sounds like that will not be an issue for you.
The kit comes with two 4ft HDMI cables, one to connect the receiver to and HDMI input on the TV, the other to connect one source device to the transmitter. The transmitter accommodates up to 4 HDMI source components, and an IR remote to switch from one input to another. The Rocketfish model number for this product is RF-WHD210, and the Best Buy sku number is 2893101.