Does anyone have any advice about brad guns? I have been looking for one for a while and I can't decide what is best. I would use it for a variety of uses: trim work, craft projects, etc. What is best: 15 gauge? 16 gauge? 18 gauge? What about brad size? Is it better to get one that shoots more sizes (3/4 - 2 1/2) or one that is more specialized (5/8 - 1 1/4)? What is the best brand? Any advice you can give would be appreciated. Thanks.