I currently have an integrated amp (Arcam A65+) with Mission M51 speakers and Marantz CD6000KI. I'm thinking of buying a matching Arcam P75 power amp, but does adding power amps really make that much difference? Will the improvements in sound quality really justify the £280 this will cost me considering the rest of my system? What exactly will changed sonically, more bass, better soundstaging, louder etc? I would like to get one but £280 is a lot of money to me, would I be better off spending the money elsewhere, like a proper HIFI rack, better quality speaker cable? Cheers!