I love the 3rd generation semi-autos. I currently have a 3914 (blued version of 3913) and a 4506-1. I had a beautiful unfired 645 and an unfired 5906, but I needed money after some medical bills and had a shop sell them a couple of years ago. They are heavy, but In my experience they are accurate and reliable. I actually sold a 4506-1 several years ago and just recently found another one without the box in pristine condition. The 4506 and Sig P220 are two of my all time favorites. If you like the big Smiths just find an extra guide rod. They are hard to come by and easy to launch when reassembling pistol. I prefer the single/double action guns, but think the Shield 9mm is probably the best carry pistol deal going now. They shoot well, are easy to control, and are super reliable. I post some pics of my new to me 4506-1 pretty soon.