Q1) My strong instinct would be to not use anything other than a pure power strip/outlet multiplier in series with a quality conditioner/surge suppressor. (The Shunyata Venom Defender in my setup is not in series; it is in parallel with the outlets on the power strip).
Q2) Various published reviews of the aR2p go back at least seven years. But since the surge protection it provides is described as non-sacrificial my guess is that you probably wouldn't go wrong buying an older used unit. But of course if a very nearby lightning strike ever occurred when it was in use it might be a different story.
Best regards,
-- Al
Q2) Various published reviews of the aR2p go back at least seven years. But since the surge protection it provides is described as non-sacrificial my guess is that you probably wouldn't go wrong buying an older used unit. But of course if a very nearby lightning strike ever occurred when it was in use it might be a different story.
Best regards,
-- Al