1. Don't cheapout and get the lowest price gun. They last and last.
2. Used guns are a great buy.
3. I very seldom dislike a firearm, but the Sigma has the WORST trigger I've EVER felt. It's abysmal. Horrid. Inexcusable.
You are comparing 2 strikers vs. a DA/SA gun. They are very different in how the controls work.
But man, buy a P95 or it's older brother the P89 and buy the Glock.