If you plan to use it for defense, or you do rapid fire double-action shooting, I'd use caution in going too light on the rebound spring.

The faster you work the trigger in double-action shooting, the more you will notice a lazy return. The idea is for your finger to stay in contact with the trigger. Some stick with a slightly reduced return spring, including a famous revolver exhibition shooter, who uses an "asymmetrical setup" with a light mainspring.
MIC-625 - $16.95 : Bang Inc., If it goes bang, we shoot it!
Jerry Miculek's S&W Action Job - DVD [MIC-X0201D] - $34.95 : Bang Inc., If it goes bang, we shoot it!
"shows complete gunsmithing procedures to "tune" the overall action of your revolver; resulting in a smoother, lighter, more predictable trigger pull. You'll learn how to reduce metal to metal friction and why trigger return can be more important than trigger pull. "