Common sense is to use CTS pots, they are good quality.
However, there are selected and matched CTS sets available from RS Guitarworks, quite expensive, but some swear by it.
I thought that I liked the sound of my original Gibson 500 pots better before I changed them to CTS, but not sure at all.
If you wanna spend REAL big then get Allessandro, they are like 50 quid each (but it's a bit crazy IMO).