Greetings. Purchased the Toshiba HD-A1 yesterday and have a newbie question about the resolution settings. I have the player hooked up via HDMI to my 50" Sony LCD display (KDF-somethingorother). I can't really tell a difference between 720p and 1080i but haven't really done extensive viewing. My question is, what is the ideal resolution to set this player at when connected to this TV?