The best solution on the market so far is the HDFury 2 which features an HDMI input and a VGA output allowing you to plug it directly into your PC monitor.
How does it work? The HDFury 2 strips the HDCP element from the HDMI signal before converting this to the RGB standard and outputting through the VGA connection.
Although cheaper than a new or second plasma TV, however, the HDFury 2 isn’t cheap. They’re over $100 (£125) each.
While there are alternatives, these are bigger, bulkier, or require additional converters. The HDFury 2 is certainly the superior choice and a popular one, with reaction from consumers largely positive.