If your TV is capable of using a DNLA connection, most TV's that can use a stream are, then you can use PS3mediaserver on your PC. It will stream anything you have on your PC to your TV, it can stream anything in any quality IE: full blu-ray ISO (50gb) right down to crappy AVI's. It keeps full resolution (1920x1080 etc...) of the source and also streams full surroundsound if that is in the source. It's also free.