Of the things you mentioned, I'd go with the Giraud, especially if you're reloading several calibers. Think of your last reloading session. You get through resizing fairly quickly, now it's time to trim. You take a case, put it in your lathe-style trimmer, tighten the case down, start turning the trimmer, and if you're lucky, you've got it down to your desired trim length. If your trimmer works like mine, the stop isn't the best, so you get variations in trim length and you have to go back and re-trim. Now multiply the time it took you to do one case by 20, 50, 100, 200, whatever. Once you're done trimming, you have to go back and chamfer and debur. Now imagine you could trim, chamfer, and debur in one step that takes about 5 seconds per case. I sat down the other day and ran through 100 pieces of brass in about 10 minutes on my Giraud. The Giraud is the one extra tool on my reloading bench that I will never get rid of.