The usual suspects from Denon, Yamaha, Marantz, Pioneer, Sony and Onkyo will all decode HD audio (it's a feature that has now filtered down to sub £300 receivers). Unfortunately your main candidiate (Yamaha 863) is out of stock everywhere and will be for a couple of months by the looks of things but you should get out and demo all the £500 to make sure you're happy and preferably with your proposed speaker setup and to ensure it has the right setup and features including inputs for your current and future needs.