Re: Hot rails any good for neck?
I had a pair of little 59s in a guitar a while ago. I really liked the cleans but under high gain, not so much. The Cool Rails is a good compromise. I would put it about in between a little 59 and a Hot Rails. It has tonal charactaeristics of both pickups.
In my experience with the Rails pickups, the Vintage Rails has the best "strat" cleans and sparkle, a good amout of quack to it. The Cool Rails does a really good blues/rock tone under gain and has some decent cleans as well (for being a humbucker). The cleans would be more like a full sized PAF type pickup. The Hot Rails is great for shredding leads in the neck. It can be a little muddy of not eq'd right. It is a very thick sounding humbucker and if cleans are important for that position, I would advise against the Hot Rails.
Don't know about the Classic Stack.