10-Ring (if I may chime in here), I liked the Wolff "hammer spring pack" for the Beretta. It came with 16, 17, 18, and 19 lb springs. (The "standard" spring is 20 lbs I believe.)
You can pick the spring you like best. I have had NO problems with the 16 lb spring so far - but I could always go up a pound or two if I was ever worried about ignition in a CCW type situation.
As for the SA pull, it is better now. Both the DA and SA pull improved noticeable when I switched out that spring. (If I was carrying it now I might switch to stronger spring to insure ignition in the colder weather during this time of year, however.)
FWIW - Logistar