I have the Furutech DPS4.1 with FI-50 NCF (R) plugs and can recommend these. The plugs are more important than the cable and I don't use anything lesser than the FI-50 NCF (R) on the DPS4.1. Initially I bought the DPS4.1 which came with older and lesser plugs and they didn't sound better than the TCS31/FI-28(R) which I also own. After several months of comparing the cords, I decided to change the plugs on the DPS4.1 to the FI-50 NCF(R) and this move made all the difference. The overall sound is much more open and dynamic with improved clarity and detail.
Apart from the DPS4.1/FI-50 NCF(R) I also have the GTX-D NCF (R) at the wall outlet which I feel is the best upgrade I have made to the system. The impact is huge. As for power cords, as we all know it needs to fit the system and components. I have a mix of Furutech and Acrolink cords in my system. The Furutech DPS4.1 is at the upstream between the wall to power conditioner, while the Acrolink cords go between the power conditioner and components. I have found that swapping these cords around will produce a different sound, so you need to experiment to find the best result in your system. The system can sound warm and unengaging with reduced clarity and detail if the cords are not properly matched to their respective components.