I found the official Ps3 headsets to be uncomfortable and fall off your ear easily.
Another solution which IMO would be better and you would get stereo output would be to buy Turtle Beach XLC's from Adsa for about £12.99 in some stores.
If you use HDMI then you can use the standard Av out cable at the same time to plug into the TB XLC with audio output settings set to go through the AV out. the TBs have an audio inline phono plugs
You wont be able to use it to chat but then again if you want it for quiet night time use you wont be anyway. BUT I cant remember if the XLCs have a mic output wire or else you would be able to use the XLC with your ps3 to chat if you purchase a USB sound card dongle
I can do this with my PS3/usb sound dongle and TB x11's as they do have a mic output wire.
Also they come in handy if you have an Xbox too.
Cechc03: Ylod repaired 18/01 Kmeaw 3.55
Cechc03: 3.55 OFW, Ylod repaired 26/01
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Cech2003b 3.15 OFW Not modding till warranty runs out