You always want a power conditioner and surge protector. Always. One with good EMI filtering is important. Look for something that will handle an 8000A surge or more and suppress EMI, sometimes called RFI, down at least 30 dB out to 30 MHz or more. Most EMI problems are solved when suppression is down 30 to 40 dB across the board but really 60 dB is far better. The problem is paying for that added 20 to 30 dB of suppression. That is my recommended minimum. If you want more, then look at the regenerative units, but they get very pricey.
