Yeah try balancing out the bass first before you start changing cables.
IMO QED Silver Anniversary biwire or Chord Carnival Silver will go well with your system.
NAD have a similar sound to Arcam and both the above cables do well especially with M/A speakers.
I dream of B&W Nautilus...
Main System - Arcam Alpha 9 integrated amp, Arcam Alpha 9P power amp with an Arcam Alpha 9 CD player and Monitor Audio RS6 speakers (connected with QED Silver Anniversary bi-wire and QED Connex 3 interconnects).