If you were to provide the components in your system (or post your virtual system), which components you are planning to power with the new cords and what budget range you are considering then folks could better advise. Otherwise, responses are likely to be all over the board.
My general response regarding DIY is that you can get a high bang-for-your-buck and, that for most ranges of components, potential differences are overrated so you can spend a lot of money that would be better spent on component upgrades. I would recommend heavier gauge conductors for power amps, and shielding cords for digital components, but not power amps. If you want bulk cable, Furutech FP-Alpha 3 is pretty good for power amps, and even preamps. Furutech FP-3TS20 is good for digital components. Both of those use Alpha-PCOCC stranded conductors. I have heard from an amplifier manufacturer that Furutech’s newer FP-S20N and FP-S35N cables with embedded nano particles are also quite good.
If you are on a tight budget, three twisted or braided Western Electric WE 10ga wires with Furutech FI-11(Cu) male and iec connectors (shielded for digital components) may be all you will need. There is a manufacturer that makes cords from this wire that are very well reviewed. Cost for two 6-foot cords using this wire would be in the ballpark of $300 if you can buy the connectors at a sale price - try Sonic Craft. Good luck.
My general response regarding DIY is that you can get a high bang-for-your-buck and, that for most ranges of components, potential differences are overrated so you can spend a lot of money that would be better spent on component upgrades. I would recommend heavier gauge conductors for power amps, and shielding cords for digital components, but not power amps. If you want bulk cable, Furutech FP-Alpha 3 is pretty good for power amps, and even preamps. Furutech FP-3TS20 is good for digital components. Both of those use Alpha-PCOCC stranded conductors. I have heard from an amplifier manufacturer that Furutech’s newer FP-S20N and FP-S35N cables with embedded nano particles are also quite good.
If you are on a tight budget, three twisted or braided Western Electric WE 10ga wires with Furutech FI-11(Cu) male and iec connectors (shielded for digital components) may be all you will need. There is a manufacturer that makes cords from this wire that are very well reviewed. Cost for two 6-foot cords using this wire would be in the ballpark of $300 if you can buy the connectors at a sale price - try Sonic Craft. Good luck.