The need for power conditioning depends on a lot of factors. The only way to determine that for your particular case is to try one (or more).
As for the two units you listed, the AQ Powerquest 3 offers series-mode surge suppression while Austere VII Series offers parallel-mode using "sacrificial" MOV devices. For more info, you might want to check out the "Surge Suppressor Basics" thread in this section.
As for the two units you listed, the AQ Powerquest 3 offers series-mode surge suppression while Austere VII Series offers parallel-mode using "sacrificial" MOV devices. For more info, you might want to check out the "Surge Suppressor Basics" thread in this section.