First, if your considering a 1911 pistol, get a Smith, Sig's 1911 series has had some issues with reliability. You'll pay more for an S&W but you'll get a great 1911.
I'll also point out that Sig's Customer service in the past year has been downright awful. However, recently they have been improving in this area but I don't think they will ever approach Smith's Customer Service.
Sig has also made some real Marketing blunders in the past year. First was last spring when they announced that they would be shipping the civilian guns with only one magazine due to a shortage of magazines from their supplier. While they were doing this they also didn't offer any compensation to their customers. That only lasted for a few months before all the complaints made them see their error, however there are a lot of these one magazine packages still on dealers shelves. More recently they have shifted to using polymer guide rods and single strand springs in some models, which is nothing except simple cost cutting that has no place on a gun as expensive as a Sig Sauer.
That said, the P225, P226, P228, P229, P239, and external extractor or German P220's are the most reliable semi's you can find. Quite simply, Sig owners put up with this crap because they really are splendid pistols. They are accurate, reliable, and very easy to shoot well. In addition, they are also very simple to work on. In terms of function, the only complaint that I would make is that the DA trigger on the DA/SA trigger set is very gritty when new and it takes at least 300 rounds of pure DA shooting, plus a lot of dry firing to smooth it out.
BTW, I have a P239-40 with over 1000 rounds on it and not one single malfunction of any description. I also have the P229-40 Elite Stainless with about 600 rounds through it and not one single malfunction, however the DA trigger on it is still fairly gritty. I'll also note that the grip on a double stack Sig is fat enough that it will take some getting used to, however that fat grip does make them soft shooting guns. As for the accuracy, I have managed to shoot sub 2 inch groups with both at 60 feet using a hard bench as a support. While that's not Bullseye accuracy, it is very good for a combat handgun.