There are many options when it comes to a media player to do exactly what you want. However I would do a bit of research as some of the cheap ones are not that great, just search for users reviews on the net. I have a mediagate media player that is hooked up to my Plasma. It has pretty good playback support in terms of formats etc. I have it hooked up via component cables and it supports 480p, 720p and 1080i content. My mediagate has inbuilt wireless and ethernet, so I can plug it into my internet modem/router via a network cable or connect it via wifi. Have done both and both work well for streaming both SD and HD content from my PC. This will allow you to keep all your movies, shows and music on your computer and you can access them using your media gate and play them on your TV etc. You can also put a hdd into and store content on there if you want. Depending on the model, they go for about $180-$300 without a hdd. Use staticice.com.au to find a good price in your area.