Hello ! I have a Marantz SR4300 receiver and a pair of KEF Cresta's 1 + KEF Cresta 20c. The sound looks flat and hollow and the higher frequences not very bright. The music lacks life. May be this is because the Cresta's, so I'm thinking fo buying a pair of good floorstanders like B&W 602.5 or Monitor Audio Bronze B4. Am I right thinking the fault of a so boring sound is the speakers fault? Shoud I get better speakers and of a diferent brand or this will unbalance the sound because of the Kef's? How can I get more pleasing - more alive - sound? Please help! Thank you in advance. Paulo.