i've just got the standard Mex ones in my Tele (factory fit)
when I was shopping for pickups years ago for another guitar I used the sample recordings on the manufacturers websites, ended up going for a Seymour Duncan JB which has become my all time favourite guitar pickup (fited in 2 guitars with another in the cupboard just in case i fins something to fit it to)
many of the aftermarket makers have sound clips to help with the decision.
Matt