Mains Filter recommendation

My Current system comprises of;

Sony DVP955s dvd player, Sony DA1200ES reciever, KEF KHT 2002.2 (5.1), Pacific 26" TV, Profigold lockable interconnects,

I recently purchased a Sound Fantastic 6 way mains filter fror £ 20 off a boot sale, the difference it has made to my system is immediately apparrent, if i knew how much of a difference a mains filter would have made, i would have been more than happy to go out and spend the full amount on one, i really cannot recommend a mains filter enough, if you don't already have one.