Cable suggestions

I was looking for some options for my system. I have a Marantz 4120 amp, NAD 541 cd player, and a set of B&W 602 s2 speakers. I am looking for suggestions for interconnects and speaker cables. I was also thinking about biwiring the speakers (depending on the cost). I am on a budget. 50 or so for the speaker cables and 25 or so for the interconnects. Any suggestions? Thanks!