Does matching components make a difference?

I presently have a Marantz sr5200 receiver connected to a NAD c521 cd player. I recently installed Blue heaven nordost interconnects as well as the 4 flatline bi-wireable speaker cables. My speakers consist of B&W 601s3. I was told that I should consider the NAD c320bee intergrated amp for my listening pleasure. I like Jazz. Iwas told that it would provide better detail and sound stage. Would this be a good move?