Re: case cleaning
it is all dependent upon your taste; they both do a good job. Tumbler is "easier" in terms of time consumption; I just set mine before I leave for work and let it run on a timer. Ultrasonic can't do as big of a batch at one time and requires a little more hands on. Ultrasonics can also do more than just clean brass; small parts and bolts can be cleaned in a few minutes.
What are you gonna do, talk the alien to death? -- (on Sigourney Weaver's worry about Guns in Aliens)
"Safety is something that happens between your ears, not something you hold in your hands."
"I carry a small gun to compensate for my huge Blue press."