Try a non-os DAC like the Audio Mirror or Audio Sector, perhaps a used Audio Note. I think you'll find that these DACs exhibit a much more analog flavor than the Benchmark, which I have heard in my system. I have the Audio Mirror ($500), which I have since had modified by TRL ($550) and if you want to know how it sounds you can read my review on it here. Vlad could give you an extra coaxial input if you needed it.
What do you replace a Benchmark with for 24/96?
I am contemplating selling my Benchmark DAC 1 because I need a DAC with two coax inputs. My current system is a pair of Monarchy SE-100's, Modwright SWL 9.0, VSA VR4jr's, Onkyo SP 1000 with DH Labs & Acoustic Zen cables. I listen to rock music & prefer a smoother presentation to my music. I must admit the Onkyo sounds very good on it's own if not a touch laid back but the Benchmark beats it on the dynamics. What are some good choices for about $1000.00?