Advice about my Gibson Les Paul Custom

I have a 1957 Reissue Gibson LPC from 1992. It’s the one with three humbuckers. I bought it second hand and I had to put a bunch of money into it (setups refret etc.) for it to play great. It doesn’t sound as good as my Les Paul Traditional with Seymour Duncan 59s. Should I put new pickups in it? If so which ones? If not what should I do? Sell it?