Monster's success was based on massively high margins for stores and allowing stores to offer, often, cash incentives for employees. Audioquest margins are more like other accessory items, far less than Monster, and in line with any nationally advertised audio product.
Audioquest's less expensive cables are built with fundamentally sound principles that follow known best practices (for that matter, so do the lower lines of Monster cables). I personally would not buy them, as I don't buy pre-made cables, other than optical cables, in the first place, but I would not consider them to be "snake oil". If you are looking at the three and four figure priced cables, that's another matter.
Manufacturers of cable earn high profits based on the length of cable; there is no reason why any fundamentally sound cable should cost more than a few dollars for another metre of wiring. That puts you into a difficult spot for a sub cable, which generally is a long length.
You would get much more value out of building your own sub cable. Even after buying an inexpensive soldering iron and solder, you will be dollars ahead and achieve excellent performance. Due to the length, you should choose a shielded cable to base your DIY effort on. Things like cable capacitance and inductance matter, but they affect high frequencies, not low. So in reality almost any fundamentally sound cable will offer excellent performance.
The Canare L4ES is an excellent candidate, at about $1 a foot. Two Canare F-09 or F-10 connectors will run you about $8. Although I prefer Mogami cables for interconnects (a little more than $1 a foot), the Canare cable has better rope lays (cotton non-conductors that keep the signal-carrying wires in perfect alignment) than the Mogami, which is an advantage in a long cable.
However, if you don't plan on replacing more than one cable, it's more cost effective to buy a pre-terminated example. See below.
" ...
Canare Star Quad L-4E6S Microphone and Audio Line Cable is flexible, satin smooth to the touch, and extra strong. The 4-conductor Star-Quad construction provides excellent immunity to hum-inducing magnetic fields. The high-density braided copper shield provides excellent shielding from RF interference. The internal construction keeps handling noise very low. The 40-strand conductors provide excellent flexibility and resistance to breakage. The satin smooth jacket remains flexible at low temperatures. The low capacitance per foot provides excellent high-frequency response.
..."
http://www.canare.com/ProductItemDisplay.aspx?productItemID=53
Connectors:
http://www.canare.com/ProductItemDisplay.aspx?productItemID=3
If you don't want to construct the cable yourself, you can buy them pre-terminated from a number of vendors online. Typical reseller:
http://www.markertek.com/product/sc50rr/canare-star-quad-audio-cable-rca-male-to-rca-male-50-foot-black
(Just change the length to the one you need).
Free shipping, any order. A 10-foot cable assembly is under $20.