Receiver video
Andrew,
If your budget allows a receiver in the $1k price range with 3-4 HDMI inputs would work well with your other equipment. Keep in mind, however, that the only source that "requires" an HDMI connection to the receiver is your PS3 for BluRay playback. For other source like the cable box could connect to the receiver with component video or directly to the display w/ HDMI.
Receiver with 2 HDMI inputs like the Yamaha RX-V663 and Onkyo 605 start in the $400 price range.