Have question: If i add Cambridge Audio AZUR 640A V2 Stereo Amplifier and connect it to my onkyo 905 and Cambridge Audio Azur 650C V2 Cd player will that make a big difference with cd performance? is it worth to spend 299 for it? as I'm not happy with my onkyo 905 with dali Ikon 6's music performance. Will that make a big difference? and why and ow do I connect it to onkyo?? what is that for?? Please help