You need to know the capacitance of the wire, the lower the better. Stay away from standard interconnect for tonearm cables. The capacitance of standard interconnect can be very high and will restrict the high frequency response of your cartridge. Capacitance loading is best done at the preamp if at all. 17pF/ft - 25pF/ft shielded tonearm cables are available from several reputable cable vendors.
If you have to go the ultra-cheap route, use RGB component video interconnects that can be purchased almost anywhere online (including monoprice) for small $. They are usually low capacitance and have double shielding (foil surrounded by braid). There will be three individual wires bonded together by the jacket in a component video cable - just use the ones marked with red and blue for the right and left channel and use the one marked green for the ground (strip the connector off of each end).
Dave
