Maintaining a "Balanced" System Design?

Congratulations on your ARC equipment. I have been a fan of ARC for forty years and only slowly over that time were able to buy, used at first and finally moving up over the last few years to all Reference level Audio Research gear. You can see my system under my ID.

While I agree that your gear requires the top notch interconnects, cables, and power cords to get the most out of them. I don’t think I would necessarily buy it all at once and the brand your dealer is recommending. You may want to take your time and find the brand that is perfect for your tastes. Transparent are a known synergistic brand with Audio Research and the one I use the most of.

$15K is perfectly reasonable given the equipment you are talking about. If you have good gear 10 - 20% the value of your system is a good rule of thumb. The most likely big gains are likely to be the speaker cables and power cord for your amp. I use Transparent Ultra speaker cables. ~$5K, but after a year of trying to figure out the correct power cord for my Audio Research Reference 160s I found The Audio Quest Hurricane (2 meters, I have a 1m and 2m on the Ref 160m monoblocks I am currently using the 2 m sounds better) . I also experimented with all my other components and found Transparent sounded best.

I have spent a lot of time with Cardas, WireWorld, DHLabs, Harmonics, Nirvana, and several other brands. With Audio Research gear you want really transparent (not warm or cool, low noise) wires to get the very best from them. Maybe Stage III interconnects are great… never heard of them. Dealers can’t carry a lot of brands, so they carry what they can… but always recommend that.

I could write a thesis on this subject and would be happy to have a more in depth discussion.

Perhaps purchase cabling on a trial or loan basis with an iron clad return policy….

@ghdprentice — thanks for your direct experiences with cabling for ARC. It sounds like you went through a lot of cables to arrive at the Transparents plus the Audioquests for power. Unfortunately I am not seeing any options for a trial run but I suppose I could call them. 

I also appreciate your perspective on the relative investment in cables. At this point I want to find a good match with my ARC reference gear and continue to ponder my speaker options. The Stage 3 cables have a reputation as super high end, but the $15k is just speakers and two interconnects, leaving me with 3 power cords to go!

@williewonka - thank you for the thoughtful response. I will dig into the specifics you detailed as I look at my options. 
 

@gdnrbob — I am coming around as well and will try your suggestions 

I was astonished at the difference mid priced power cords make, more than any speaker cables did at twice the price.

Based on the reviews and opinions on here I’ve seen, you will likely love Joseph Audio speakers!