Re: Fat, warm SD pickup?
You haven't said what guitar you want it for, but I assume it is a PRS which tends to be somewhat bright to begin with. And in that case the Custom Custom may be a good choice for the bridge. But there are others to consider.
Bridge: 1. Custom Custom is a fat, warm, dark sounding pup, but it doesn't have much high-end clarity/snap. Sounds like you have a blanket over your speakers.
2. Alternative 8 is also fat and warm, but retains some high end. It has good clarity and articulation. It's a great pup for full rich clean tones played right directly into your amp. And yet, when you want to push it, it will respond with lovely distorted tones. This is one of my favorite all around bridge pups, especially for a naturally bright-toned guitar.
3. Seth for more vintage tones and output.
Neck: 1. Slash
2. Seth
3. Screamin Demon
4. Gibson Classic '57 (I know I'm going to get some flack for this one, but I happen to love the warmth and smoothness of this pup in the neck)