Seeing as a few of you fine fellas are talking about the s60/64 in relation to a home theater, and seeing as I just bought a home theater in a box last week, I would post my findings!
Should this be of help to any of you great! If not..... well too bad i guess!
The system I bought is the Sony HTSF470
It is a 5.1, all wired home theater system, though it is capable of using wireless speakers with an apparently no longer available adapter and wireless speakers, that just comes with a receiver, no cheap blu-ray player here that eats $100 of the cost of the system.
It has HDMI pass-through for 3 HDMI devices, with a single hdmi out to the television. It also has two optical in's and coax in, as well as two rca inputs which can be used for anything you want (including converting into a 3.5mm audio jack to plug anything in with one of those, just need the cable adapter). Having just one hdmi cable into the back of the tv is awesome, and helps make up for the really lame amount of hdmi ports on the tv itself.
It also supports bravia sync, so it is capable of receiving commands from the s60. It will turn on when the tv is turned on, and will accept volume control commands from the regular tv remote, or any other remote you use to control the tv. Best of all it supports the Audio Return Channel, which the s60 also supports (HDMI 2!!!!), so the built in apps will send their audio to the receiver, no extra cables needed. I have not tried plugging in a surround sound capable device into the open jack on the tv itself to see if it will forward on the audio to the receiver, no idea if it will even do that but it would be awesome!
All of this seems to work fine for the most part, there have been occasions when they seem to decide to not work. But turn the tv off and on and they work fine again.
The system seems to work fine with everything I have put into it, especially games. Man does the surround sound make them more immersive.
Anyway, from what i've experienced of it I definitely recommend this system. Been great to me so far.