I've used a similar power strip for years. The cords still seemed to help. I could hear a similar difference with both the mhdt tube DAC in my av system upstairs and with teh mndt SS DAC in my main rig downstairs. Power cords themselves can be a cause of RF noise. A product designed to address this effectively like teh Pangeas seems to be the key. So I think there is a good chance your setup might benefit. Of course a big factor is how good the existing power cords may or may not be in this regard, and how signficant the RF noise issue, which will vary case by case. I know with my main rig in general that I am constantly battling RD and EM noise issues both from my gear and other large eletronic household devices not far away, so I am always looking to do whatever I can as an insurance policy, and each time has paid dividends to-date.
With the Pangea's, the build quality is excellent and the price reasonable, especially at the recent going prices, so even if no audible difference, you still feel like you are using a good product for the task and not cheated.