Simaudio or luxman dac?

I like what I have read about the luxman da-06 dac. The simaudio DAC's, the 280d and 380d also get good reviews. Yet, somehow, I cannot wrap my head around the luxman brand when it comes to a digital dac. I love it's looks, and reviews like its sound, but it has high jitter in the graphs in spdif inputs...not so with usb. Simaudio seems to be well grounded in the digital arena, but can the 280d dac at $2200 compare to a luxman at $5000....or is the cost irrelevant and simaudio is just better at digital? Can anyone give me any input/experiences on the simaudio 280d? Most appreciated!