I am in the market for a 9mm. I have a H&K USP in .45, absoulutely love it. It is just $$ to shoot. I am looking at Sig as a choice for 9mm. Any suggestions on what model? My sisiter has/had a sig not sure the model it was a single stack though, shot pretty nice. I am wanting a double stack. Suggestions on a sig, or should I just stick with H&K?