DIY will get you an excellent power cord.
Furutech FI-11M Cu Male AC plug on clearance from Sonic Craft at $35
Furutech FI-11(Cu) IEC connector from Parts Connexion at $50
DH Labs Power Plus Reference power cable from Parts Connexion at $8/foot
Believe it or not, the type/quality of the connectors makes a significant difference in the power cord. The Furutech "(Cu)" plugs I am recommending above are actually un-plated copper (or phospher bronze with the IEC). These give a very neutral and fast responding type of sound. I would avoid gold-plated connectors (even though they are more expensive) because the gold-plated will sound warmer/slower and I don’t think that is what you are looking for. These connectors are the cheapest ones I would recommend. I would actually want to choose a better cable than the DH Labs, but it would be impossible to keep the cost under $150. Rhodium plated A/C connectors will be faster and have more detail (and have an incredibly long 250 hour burn-in), but they are also more expensive. You could get the cheaper Wattgate Classic A/C connectors, and this would allow you to choose a more expensive cord. They are very fast and detailed, but I have found they tend to be somewhat harsh/bright/sterile in comparison to the Furutech connectors. My opinion is that the Furutech will give you a more engaging sound. I have done a lot of R&D on power cords and have used all of the connectors I have mentioned above.
I personally do not like silver/silver-plated elements, but some do. I have found they push the upper mids/highs too much and can sound not as real.
