Optimal anti-malware/spyware/virus software and their necessity

Before I list the softwares in consideration, are computer protection suites even necessary when matched against freeware? If they are, which one of these 5 suites do you recommend and why: AVG, BitDefender, Kaspersky, MacAfee, and TrendMicro. I chose the first 4 because they were among the higher rated in Consumer Report; TrendMicro was included because I have had decent personal experience with it. Thanks for your consideration.
 
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