I just purchased a model 19 S&W and was thinking about how much my collection has changed over the years. I have my three gun rotation that I carry depending on my clothes so everything else I buy is just for collection purposes or fun shooting. I am not near as experienced as most of you so I was wondering what guns are a must have for your collection. The model 19 was one of mine that I was lucky to find and I really want a P7. What are your must haves?