What sort of amp do you use ?
My two main amps at the moment, an old Peavey Bravo and a Peavey Delta Blues (the very first to arrive over here) - I know some purists out there will get shivers and feel sick, but I don't give a d...I've had Marshalls, Fenders, a Crate, you name it, but these small oldies floor them. Both sound great, especially through a 2x10" or 4x12" cabinet. Period :p
However, my L-280/29x equipped guitars sound completely different through these two "rigs". The Delta Blues is way rounder/warmer sounding. The best way for me to brighten up the Delta Blues sound - when it's needed - is to use Bill's low cap cable. Works like a breeze. Actually I use Bill's cables all the time.
Bill's low capacitance cable(s) will have a bigger impact on your sound than changing pots. Besides, I can still enjoy the benefit of the 250 K log taper;)
The taper of a 500 K log pot may be very effective when doing pinky swells - even if it's hard to admit :b