I just got something cheap ($50-60) from amazon. It's a little loud, but works well. A living room one you should probably go a little more upscale for something quieter. More money is probably quieter, prettier, and more energy efficient. I don't have any recommendations on mid-range or better ones. Eliminating pets is the most beneficial preventions. 2nd is using a central vac instead of a portable vacuum cleaner. A hepa vac would be also a better choice than a normal vacuum cleaner.