I used the Valab silver digital cable as both a IC and for Spdif. Compared to AQ King Cobra its softer sounding and more forgiving. Its not at all like your avg. silver cable in that it is not the least bit bright or edgy. Its a good all around cable, not the best but certainly a very good cable with great build quality that will keep your IC upgrade demon at bay for awhile.
As far as the Valab powercords go, I have every PC they made...they are all average but sound great with better ends.
I also have a very rare Valab Silver Ribbon IC, it sounds fantastic.