Balanced vs. Single Ended Interconnects

Is it worth getting some cheap Monoprice XLR cables

Yeah - I think it is worth it to try them.
I personally use Mogami and Neutrik, but I doubt it makes much difference in XLR.z
It should sound great… or as great as the same cheap cables it was recorded with in the studios.

you’ll be fine.

I second Mike's suggestion to get some cables made from Mogami W2549. You'd have to spend quite a bit more to get better cables. 

In my experience (with the Terminator and Terminator Plus), the Denafrips DACs perform much better when using balanced connections. 

Though I may be mistaken, it looks to me that your Pathos Classic One Mkiii is not truly balanced. That is, it does not use differential circuitry; the balanced inputs are either transformer-coupled, or simply single-ended inputs on XLR connectors. If that's the case, you're not likely to get much (if any) benefit from using a balanced cable.

According to Ralph (Atmasphere), if both components use true balanced architecture, there is minimal benefit in using uber expensive balanced interconnects.  Ralph, if I have misinterpreted the above feel free to correct me.

IMHO there is really never any situation where using really cheapo wire is advisable when Blue Jeans, Redco and plenty of other companies sell interconnects (and speaker and other wire) using excellent Mogami and Canare wire at VERY reasonable prices.

@cleeds about 6.50 in Kevin addresses the balanced input question. It is fully balanced according to Pathos.