So lately I've been thinking about what I should get as a stack, when the time comes. So could anyone recommend a good one for a beginner, or one as a first one? Not that prices really matter, but if possible try to keep it around $500 and below. Correct me if I got any names wrong. Also, if someone would be kind enough to explain what each thing does, since I really don't know much about stacks. Also, what's an ohm?