Fred,
Buy the Starline brass, and most likely the .356" bullets are going to shoot more accurately than the .355". I'm not sure which you have the 3K of, but try them both some pistols do in fact prefer the smaller pills.
Privided the S&W 1911 accepts normal 1911 mags, the Chip McCkrmick mags work very well, and are not overly expensive, load wise the super is really easy to load for and accepts a wide array of powders. I'll leave the recipies to other folks.