Hi, newbie here. In the old day’s I’d buy a $10-$30 surge protector to protect my computer from surges. Now I’m being told I need to buy a $100-$300 dollar surge protector to filter/protect my audio and video components in a home theatre I’m putting together. My question is, do you really need one of these high dollar surge protector/filters? Or will an old school $20.00 protector do the job? If I need the high dollar unit, what should I look for, and what are some recommendations for a good one for a good price? Thanks All!