I use the Marinco plugs and IEC connectors with excellent results, which are based on the expensive WattGate products. Marinco makes the plugs for Ray Kimber's WattGate company.
The place to order the Marinco plugs is www.partsexpress.com. Incidently, PS Audio uses the Marinco plugs on their highly regarded Lab Cables, I've noticed. Check out some power cord designs on the web like Chris Venhaus' "Flavor 1, 2, & 3" (www.geocities.com/venhaus1/diymains.html), and the Alan Maher designs on the AV Science Forum (www.avsforum.com).
Do a User Name search under "Alan Maher" in the Audio Video Improvements forum and a whole list of his DIY power cords and such will pop up, including his $50 Synergistic Research A/C Master Coupler Clone project and the recent Perfect Cable designed DIY Power Cord recipe.
I built the Venhaus Flavor 2, with 10 AWG Home Depot stranded THHN copper and I really like it vs. the stock cord that came with my EAD PowerMaster 500. And I built the Perfect Cable DIY project also with 10 AWG, which is a 4 wire braided design. It is still burning in at the moment, but initially the Perfect Cable sounded bigger and more open in the mids and highs, but had less focus and control in the bass compared to the Venhaus. Alan assures me that the bass will imporve with around 100 hours burn-in.
www.audioasylum.com has much debate on the topic of the "best" A/C and IEC plugs and even outlet receptacles. Click on "Cable Asylum", then start searching under names like Marinco, Leviton, Pass & Seymour, Hubbell, Furutech (probably the best IEC, $60!), WattGate, Eagle, etc.
Email me at www.dennis.markley@firstunion.com if you want more details.
Good Luck!
