Update: I got a Marantz 6000 cd player connected to the receiver now. The sound is a fair amount fuller than when I had my dvd player playing cds, attached with digital coax. Does this mean that the marantz cd player has a better DAC than the receiver?

Also, I'm starting to wonder if my setup is just too small for my room. I have the Marantz 5002 (90 wattsx7), Marantz 6000 cd player and B&W DM602 S3s for my set up. The sound is quite nice, but seems just too small. Should I fix this by feeding the speakers more wattage (get a receiver with 115x7, i.e.), or look at getting floorstanding speakers?

I'm at a loss, as to which solution would be the best and cheapest. I like the 602s very much, and would almost prefer not to have to replace them with bigger speakers.