I'm going to be doing some kitchen remodeling soon. I'll be removing a wall and putting up a header, working with 2X4's , Etc.. I want to add a nice nail gun to my arsenal of tools. I already have a huge air compressor which I use for working on cars so I wouldn't need that. I have no idea what makes one nail gun better than another. Can you guys point some things out? I'll also need to be using brads and finishing nails so don't know if I need a separate gun for that, or 3 guns (one for each) or if one gun can use all.