Though the DL-103 is a good mc cartridge, it is a mismatch for your system. The output is too low to properly match with the phono input in your preamp. Denon makes a couple of very good performing mc cartridges that would have similar output as your Shure cart and will provide much better performance. The Denon DL-110 comes to mind, but there are other brands that produce high output moving coil (HOMC) cartridges.
