Frank's Analog1 and Analog2 interconnects compete with cables in the $100 to $250 price range.
His power cords: the Magic and HC Digital are superb! They compete with stuff that cost many hundreds of $$$.
I have owned the Analog1, Analog2, Magic Power HC, Digital PC, and his shotgun bi-wire speaker cables. Frank is a terrific guy, and his cables are a fine upgrade from stock quality. However, there are a number of IC's in the $100-250 range and power cords in the "hundreds of $$$ range" that will outperform them by a considerable margin. Verastarr, Z-Squared, Ridge Street, Aural Thrills, just to name a few.
Signal are the perfect cables for those who are convinced that expensive cables are a rip-off, or for those who are sold on the visual aesthetic (i.e., they LOOK like the more expensive cables, therefore...) without actually trying the gamut of offerings in the market. It all depends on what you want to spend, and perhaps what is appropriate for the quality of your system. If you are curious, buy various used cables and see what you think. You can always re-sell them for the same price. Otherwise, try
http://www.usedcable.com and they can advise you in accordance with your system and listening preferences.
Best of luck,
Howard