If you are in an area where you get a lot of lightning in storms then yes I’d suggest getting additional surge protection as a backup to the whole home surge protector. I’ve had to have a couple WHSPs replaced due to lightning striking that close, and luckily the WHSP did its job. My power conditioner includes surge protection, If you decide that you don’t want a power conditioner you might consider a Shunyata Venom Defender for additional surge protection, plug into an unused outlet where you have the equipment plugged in.
Specific to a power conditioner I’ve definitely found improvement from using one.
Specific to a power conditioner I’ve definitely found improvement from using one.