The z310 does not have HDMI inputs - only one HDMI output. You can't plug your 360 into this system. You would have to plug your 360 directly into the TV. You could run the 360 audio cables to the 310 but you can't pass along a video signal through the 310.
Hope that helps,
I have decided to purchase the HT-Z310T home theater system to go with my PN50A550. I just had one question before buying it...Does it have only one HDMI port? I ask because my plan is to hook up the TV as well as my 360 to this system and was not sure if the 310 could accommodate me in this way.
Thanks for any help.