Novice interconnect question.

If buying interconnects for a system comprised of a preamp, amp and CD player which link deserves the better quality cable. Finances limit my purchas to one good pair at this time.
Always, my opinion, underline that, start with the best at the source, whatever is lost there is never again found.
start with the source.
What kind of system do you have? What kind of interconnect are you using now and what are you planning to buy? Without knowing any of these, it is impossible to tell what will be the best course of action.
I agree with Uru and F1- I most always put my best pair between the source and the pre - so in your case the CDP and the pre - but (always a but) once you have the new ICs and have let them settle in (100 hrs min) you should try them between the pre and the amp - sometimes it works out better...