I've owned two Sigs and both of them were lemons straight when I got them. I now own two Hks, a USP and a P30L. Sigs QC alone is enough to make me turn my nose at them now. I'm not saying you can't get a good one, I'm just saying I had probably the worst experience imaginable with them. I second the idea of using the P30LS to train, and shoot the Hk45 when finances allow, they are essentially the same pistol control and feel wise.
Care to elaborate? It seems that people with issues with Sigs either
a.) Ride the slide lock or
b.) Are using the inferior Checkmate magazines they come with, orrrrrrr
c.) Insufficiency lubricate 'em
But I'd be interested to know how they were lemons. One is possible, TWO Sigs and they're both lemons...that's gonna need some clarifying.