I'm looking for a pair of interconnects that won't shatter the bank....

SKW RCA cables are excellent and affordable.

Primedia cables are quite good for dirt cheap too:
https://www.ebay.com/itm/202959567957

Pine Tree looks like the choice. Mogami for less than DIY at minimum wage.

Morrow are generally good value for money.

Ice Age Audio makes excellent cables at very reasonable prices. 

I personally find most cables and the differences over-rated by LOT. There are certainly poor cables - you need solid connectors, hopefully a shielded cable, and relatively pure copper twisted pair (or with a shield, not, I guess...). The insulation ought to have linear dialectric properties since it is a very, very small capacitor.

There are several very reputable makers of raw cable including Mogami and cardas, as well as the truly industrial stuff (but then you need to understand and spec everything, so maybe not for you if you;re asking int he first place). There are a few places that assemble them - some are noted above, and others are right on Amazon and advertize what their raw materials are. Depending on several factors 12 foot pairs might be on the order of $100-150/pair.

Also agree with MillerCarbon that you might look at your cable map. I am however assuming you have a good reason: (i don’t know your sub-woofer, but the following is commonplace) that you are using the low-pass and high pass filters built into your sub-woofer. If you want to avoid running everything through it you;d need to duplicate at least half of that and ensure that the LPF and HPF are synergistic - a bit of a DIY. But yes, over time, improving that crossover and associated wiring could help at the cost of complexity for you.
G