Its a combination of grass being greener on the other side and not commiting to a particular firearm design. Enough people say this gun or that gun is better so the owner comes to a conclusion that it will make themselves better....which it wont.

Bottom line is if your good with your Sigma then why would you want to change.

Personally I love the sigma/SD series. I think they are pretty much perfect. I am accurate with them and actually like heavier triggers. They handle like a streamlined glock and dont have the bulk. I also think the sigma series guns are really good looking polymer pistols compared to what has been coming out the last few years. They just had a nice smooth FN type look to them before the sd series.

The only new striker I have like in the last few years is the HK VP9. Nice pistol but it doesnt do anything my sigmas cant do.