SIG is about 9 month behind on their orders for the 250. Interchangeability is really a great idea, but I bought the 250 for the size and weight.
Way back when, I really did some great shooting with my 1911s, currently I have two Kimber Custom shop pistols at the moment along with a Ultra Carry II. I prefer the Brown Hi Power over many of the modern 9mm pistols, and I can go on and on, but the P220 is the best combat pistol I have ever owned or used. I carry my 220 while working on my farm, I have surprised a coyote, come across copper heads, gotten a few ground hogs and got to read the riot act to a "surveyor" that was on my land illegally. The surveyor didn't get shot, but he nearly filled his pants when he saw that pistol on my leg.
The P250 comes out when I am practicing on my range, when I go hunting on state land, I generally carry a smaller pistol concealed, it is legal here to do that when hunting if you have a CCW license. A few years back there was some crazy with a high powered rifle that was killing hunters. Here in Ohio hunting is generally restricted to shot guns, muzzle loader, pistols and bows. So I carry extra protection just in case.
The P250 is a great pistol, some good ideas are incorporated into the design, maybe in 5 years any problems will surface, but with SIG those problems will probably not exist. They make very fine pistols, BTW my first SIG was a P210-2.
Jerry