I have never owned any power cords from Mad Scientist or Anti Cables, but I do own digital cables from Mad Scientist (USB cable and Ethernet cables), and they are fantastic. Without breaking the bank. They outperformed way more expensive digital cables I used to own.
I would also recommend Zavfino. The Prima MKII is at your price range. Fina is also great (first level Zavfino with 6N OCC copper, tight pitch strand). 14 gauge. There is a FiNA available right now at US Audio Mart for about $300