I liked the 500T in the Classics I have had. It is a good pickup for hard rock and metal. If you want traditional blooze or smooooth jazz, look elsewhere. I thought it did a a really good blues rock tone with the volume knob rolled back a bit.
I have a 2000 LP Classsic Goldtop and am very satisfied with the stock 500T. I also get more compliments with that guitar through my rig than any of my other guitars. I don't want to mess with a good thing.