I own a pair of MC501 monoblocks driving a pair of Quad 2905 electrostats. My preamp is the McIntosh C45, a solid state unit. Does it make any sense to replace the C45 with the C2300 tube preamp? What are the advantages/disadvantages sonically? I keep reading reviews about McIntosh equipment that their solid state products sound like tubes, and their tube products sound like soild state, so am I essentially making an equal exchange? Appreciate your perspective if you have heard such a system.