I really need to sort out a new hifi (am I still allowed to use that term or has it been superceded. Honestly I feel like the guy trying to buy a gramophone in Not The Nine O Clock News). Unfortunately I have next to no knowledge about such things. Am I better off buying an all in one system or should I put together a system of seperates? I have a Philips Widescreen tv with built in 5.1 DD and wonder whether it would be worth specifying an amp to replace that as I've heard they're better. Can you offer any general or spoecific advice?