Recommended DAC with Simaudio i-5

Looking for recommendations on DAC to place between my airport express and Simaudio i-5. Music tranmitted wireless to airport, then digital to DAC. Speakers are Paradigm 60 v3. Looking for DAC under $1,000.00. I know you can get the Benchmark, etc. for under 1K, but I'm really concerned about synergy with the i-5 as opposed to just getting the best brand name DAC. Thanks for any advice!