Since the Sigma was replaced by the SD VE series years ago, I don't think that anyone is buying a Sigma for anything more than sentimental value. The Sigma was stigmatized by having the absolute worst trigger on a handgun. There were other issues, to be sure, but the long-traveling, heavy-pulling, gritty feeling trigger is what killed the Sigma - not Glock's lawsuit.

The SD addressed and fixed the problems that the Sigma had but did not do enough to improve upon the trigger for most owners tastes. Enter the 3rd-party innovators like Apex and Galloway who lightened up the trigger and shortened its travel so that now it pulls like the Go pedal on a smooth riding, double-action revolver.

Keep in mind that the trigger travel and pull weight ARE the safeties in most small, light-weight, self-defense guns. The SD stands for Self-Defense and the idea behind it is to counteract the rush of adrenalin when you're awakened in the middle of the night by someone you don't immediately recognize. To make sure you don't shoot your roommate or family member, the SD won't fire unless you really want it too.

They say that about a Glock, but a 4lb trigger pull on a bladed trigger is a lot easier to let one fly when you least want it to leave your gun.

Reliability-wise, the SD has built up that reputation as well.

The Glock used to be the King of the Block in poly pistols. Now it is just an overpriced Block.

What will an SD VE give you that a Glock can't?

$200 in your pocket.
No fear of accidental discharges
No fear of slide bite or slide slice
An easier to rack semi

What will a Glock give you that an SD VE can't?

A gun for every American pistol caliber made
A gun in every size for every caliber
Cheap poly magazines in a wide variety of capacities, including 50 and 100 round drums.
Interchangeable front and rear night sights
and, in deference to its decades on the market, lots and lots of 3rd-party add-ons.