Are Expensive Balanced Interconnects Necessary?

Many folks have said what I've experienced:

1. It depends; the equipment must have differentially balanced circuitry to have significant benefit from balanced cable
2. There is 6 db more level
3. Experiment - we all are people with biases.  I've first started Mogami and experimented with Kimber Kables - which I decided to buy because I thought there was an improvement in the dynamics especially at high and low frequencies.

My view is cables can compliment your system - I'd be deliberate on when you decide to invest in cables especially if you are considering upgrading other components.  

@cleeds Thanks for providing an example supporting ‘it depends’. 

@vonhelmholtz indeed and I personally wished that wasn't the case because it would make it so much easier!