The Benchmark StarQuads are very good cables and I would not have looked at anything else except for the fact that I had to get my Audience cables upgraded due to damage of the AU24 and AU24e originals. They are a tiny bit better than the StarQuad on the short run between the DAC and preamp.
My SACD player and 2 FM tuners will get 3 foot AU24SE cables from this upgrade that yielded 5 cables from 1 very long AU24 and 1 short AU24e. I will set this all up next week when my rack arrives. I could sell all of these cables to buy a long XLR between the preamp and amp but it sounds like what I am doing is the next best thing.
One thing that I really should ask Benchmark, and I will when I buy 2 more pieces from them (HPA4 + AHB2), is if their gear works well with long XLR runs and "non-professional" grade XLR's. I been bugging them a lot already so I will pace the questions to them They use the term professional grade vs consumer grade (such as my AU24SE).
STUDIO-GRADE BALANCED INTERFACES
They will need some time after the factory SE upgrade to settle. The upgrade involves a new junction between the wire and the XLR plugs and the new plugs which benefit from some time and use as well as a crypt treatment that I in theory affects the molecular alignment of the copper in the wires. I had the factory do this same upgrade on a few pairs of cables in the past. I enjoyed the improvement that it brought after they settled a little. Started a little hot in the treble region. I have subsequently upgraded to the AU24SX balanced cables representing an additional improvement in my system. I use my best cables at the source and work in from there...
Normally I would replace cable closer to source - in this case DAC to preamp, but in your case you can set both cables at +22dBu (close to +24dBu pro standard) and the most obvious difference is cable length. IMHO, cable always has negative effect on sound (shouldn't be used as tone control) and this effect (capacitance, dielectric absorption, electrical noise pickup) is proportional to cable length. Since cable between HPA4 and AHB2 is as long as 20 feet I would replace it first.