speaker and interconnects, how nice do I need

I am putting a system together, It is a NAD c356bee integrated amp, dynaudio x14 bookshelf speakers, and Marantz sa8005 cd player.  I put this together used for 2000, so I don't really want to spend another 2000 on cables.  What level of cables matches the level of components, I was hoping to stay under 200 for the pair of interconnects and speaker cables, so @ 100 each, is this possible.  Is my system still on the economical side to the point that it does not matter much, or will I notice a big difference between cables. 
thanks
sam