Balanced interconnects vs. Analog

You would have to experiment to determine which ones, balanced or RCAs sound better with your equipment. They may also just sound different. If you decide to buy any cables thinking that you might have to sell them later, don't buy anything shorter than 1 meter or you will have trouble selling them. And yeah, comparing Mogami with true audiophile cables would not be fair, with some exceptions as I heard.

Also, do you want cables that are pure or mostly silver or mostly copper? This does matter and very much depends on particular system and taste. In my solid state system with analog source I use both silver and mostly copper alloy cables in the chain and silver speaker cables. I have warm sounding speakers. It can get a little complicated.
By the way, I used to use DiMarzio pro RCA interconnect, excellent for analog source, good overall balance soundstage and bass, not cold not warm, just about right.