In addition to the sear, get the Volquartsen hammer as well. It's matched to their sear, and will result in a crisper let-off than the VQ sear with the Ruger hammer.
Places like Midway, Natchez, or Brownell's sell all three (hammer, sear, and trigger) as a kit for about $90 if I recall the price correctly.
Try it.... you won't believe the difference.