Iain did put Evos in his JS
. *They sound very good, though the guitar still sounds very much like a JS
Personally, I like the PAF Pro as a neck pickup, but I don't usually use distortion with the neck pickup. *I have a J-Custom with a Fred in the neck. *It works better with distortion I think, but sounds a little 'flat' clean when compared to the PAF Pro. *If you're looking for something similar to the PAF Pro tone-wise, but with a little less bass, the Fred would probably be a good choice.
The Air Norton is also a great neck pickup, very smooth. *I've only played one a couple times, but wil be putting one in a guitar soon. *Sounds great clean as well.
The Humbucker from Hell, as Jono noted, is another great neck pickup to use with distortion, very very smooth, brighter than most neck PUs, bu not in a bad way.
Either of those three should take you in the direction you're looking to go, the Air Norton would be my personal choice of the three.