I actually have no idea what your asking. You want to connect your ps3 and laptop via hdmi, and you dont know how your tv will recognise them?! huh?!
And how does the system connect?? As you would expect. PS3-tv via hdmi. Laptop- TV via DVi-HDMI lead. Ipod-Laptop.
And with that in mind, what system are you looking for to spend £250 as all that will work on its own????
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Sony KDL40W2000, Onkyo TXSR875B, SONY PS3, Xbox 360, Sky HD, Wii, B&W 603's, AE 107C, and some cheaper speakers to compleate the 7.1 Speaker setup.