I use a Hornady and am completely satisfied with it. Whatever you choose, be aware that tumblers are designed to polish brass. Regardless of the media you choose for your tumbler, it will last far longer and provide better results if you pre-wash and dry your brass (1/2 hour in the oven @ 175 F works well). This helps eliminate any dirt, sand etc before it gets into your tumbler to become imbedded in your brass and eventually possibly scoring the chamber of your firearm. I have used Birchwood Casey Case Cleaner with good results. It is reuseable many times. However, in a pinch I have also soaked brass in a heavy duty pressure washer cleaner degreaser from CTC. Use it the same way. Soak for an hour; rinse well under hot water then into the oven (1/2 hour in the oven @ 175 F works well). As for selection of media, I use only corn cob for polishing. I am a little apprehensive about any polishing media that may erode my brass.